I am judging by competitive viability. Here is the list:
Charizard Line's: is debatable, both don't have much use, and it is often Mega Evolved anyways
Caterpie: Run Away doesn't have much Competitive use
Weedle: Same as Caterpie
Ratatta Line: Guts is superior to Hustle
Alolan Rattata Line: Thick Fat isn't as useful as Hustle
Ekans Line: Intimidate is generally more useful than Unnerve.
Cleffa and Clefairy: If not in a double battle.
Iggly Line: Depends if you value Cute Charm or Frisk more
Oddish Line: Run Away and Stench aren't that Great
Paras Line: Damp...
Venonat: Run Away
Diglett (and Alolan) Lines: Sand Force isn't amazing :P
Meowth Line: Technician>Unnerve
Growlithe Line: Intimidate is often better than Justified
Machop Line: No Guard is better than Steadfast
Bellsprout line: Doesn't use gluttony much
Tentacool Line: Clear Body is favored over Rain Dish
Geodude Line: Rock Head and Sturdy Surpass that of Sand Veil
Ponyta Line: Flash Fire is more consistent than Flame Body
Magnemite Line: Magnet Pull is used far more than Analytic
Dodou Line: Early Bird is favored over Tangled Feet
Seel Line: Thick Fat is better than Ice Body
Alolan Grimer Line: Unless in doubles
Shelder Line: Skill Link is their best ability
Onix: Weak Armor is rarely used on Onix
Drowzee Line: Insomnia is the most beneficial
Cubone Line (non Alolan): Battle Armor isn't that great
Tyrogue Line (excluding Hitmonlee): All have better Regular Abilities
Lickitung Line: Oblivious is used more often
Happiny Line: Unless doubles.
Kangaskhan: Inner Focus...
Horsea Line: Damp...
Mime Jr. Line: Soundproof/Filter are favored over Technician
Scyther Line: Technician is key
Eevee: Adaptability is Eevee's Best ability
Umbreon: Synchronize is more useful than inner focus.
Porygon-Z: Is fast enough than analytic is pretty useless.
Kabuto: Swift Swim is favored
Ledyba Line: Iron Fist... with that base attack...
Chinchou: water absorb
Togepi Line: Serene Grace is best
Mareep Line: unless you are in doubles...?
Azuril Line: Close, but Huge Power Takes the Cake
Bonsly Line: Rattled isn't great
Sunkern Line: Early Bird isn't great
Yamana Line: Speed Boost is better than Frisk
Wynaut Line: Telepathy is very useless
Dunsparce: Rattled isn't great
Snubbull Line: Intimidate>Rattled
Teddiursa Line: Honey Gather and Unnerve are not as good as Quick Feet or Guts
Delibird: Hustle is better than Insomnia
Skarmory: Sturdy is best
Raiku, Entei, Suicune: Pressure is better than Inner Focus
Larvitar: Sand Veil...
Mudkip Line: Damp...
Poochyena: Rattled isn't great
Wurmple: Run Away...
Lotad Line: Swift Swim is better
Pelipper: Drizzle is most useful
Ralts Line (except Gallade): Uness doubles...?
Surskit Line: Swift Swim and intimidate are better
Nincada: Run Away...
Nosepass Line: Other abilities are better than sand force
Meditite Line: Unless doubles...?
Electrike Line: Lightning Rod is Used More
Milotic: Cute Charm isn't great
Spheal Line: Thick Fat is better
Beldum Line: Light Metal isn't useful
Registeel: Light Metal Isn't that useful.
Turtwig Line: Fails to make good use of either
Empolean: Close, but defensive Torrent is used more than offensive Defiant
Kricketot: Run Away
Sheildon Line: Sturdy is more important than Sondproof
Buizel Line: Swift Swim is more "Dangerous" than water veil
Gastrodon Line: Storm Drain and Stricy Hold are used more than Sand Force
Buneary Line: Limber is only good Competitive Ability
Glameow: Keen Eye isn't great
Hippopotas Line: Sand Stream>Sand Rush
Skorupi Line: Sniper is best ability
Finneon Line: Water Veil isn't great
Snover Line: Snow Warning>Sound Proof
Dialga/Palkia/Giritina: Unless Doubles.
Tepig and Pignite: Thick Fat doesn't help much.
Oshawott Line: Shell Armor isn't that useful
Lillipup: Run Away...
Munna Line: Unless Doubles
Pidove Line: Rivalry isn't great
Roggenrola Line: Sand Rush isn't great
Sewaddle Line: Overcoat isn't as good as Chlorophyll
Cottonee Line: Chlorophyll is used less than Prankster
Petilil Line: Leaf Gaurd isn't that useful.
Sandile Line: Both abilities are better than anger point
Darumaka Line: Zen Mode and Inner Focus aren't great
Sigilyph: Tinted Lens isn't as good as other abilities
Vannilluxe: Snow Warning is better than Weak Armor
Emolga: Static is luck based, whereas Motor Drive grants an Immunity
Frillish Line: Damp...
Ferrothorn: Iron Barbs>Anticipation
Axew Line: Mold Breaker>Unnerve
Stunfisk: Best ability is Static. Sad.
Meinfoo Line: Regenerator used more than Reckless
Pawniard Line: Defiant is better than Pressure
Bouffalant: Reckless is used most
Durant: Traunt is unreliable
Larvesta Line: Swarm is rarely used if ever
Tornadus/Thundurus: Prankster is used more than Defiant.
Fenekin Line: Magician isn't great
Fletchinder/Talonflame: Flame Body is generally better
Scatterbug Line: unless doubles
Flabébé Line: unless doubles
Espur: Own Tempo isn't that great
Inkay Line: Contrary is Favored
Binacle Line: Pickpocket isn't great
Helioptile Line: Solar Power isn't great
Hawlucha: Unburden is preferred
Dedenne: unless doubles
Noibat Line: Unless doubles
Rowlett Line: Long Reach doesn't do much
Pikipek and Trumbeak: Pickup doesn't do much
Crabrawler Line: Anger Point isn't great
Cutiefly Line: Unless doubles
Rockruff and Lycanroc Midday: Steadfast/Own Tempo isn't as useful as it's other abilities
Mudbray Line: Stamina>Inner Focus
Dewpider Line: Water Absorb isn't very useful
Salandit Line: uses Corrosion more often than Oblivious
Stufful Line: Uses Fluffy most
Bounsweet Line: unless doubes
Comfey: Triage is its best ability
Sandygast Line: Sand Veil is almost never used
Togedamaru: Uses Iron Barbs more than Sturdy
Bruxish: Strong Jaw is used the most
Drampa: Cloud Nine isn't really used much
Source + Smogon's Strategy Pokédex
Hope I Helped!