I'm not giving a set for Rhydon ir Steelix because I don't feel as if they have a place in OU.
Rhydon's x4 Grass weakness and RU tier status means it's outclassed by so many Pokemon in OU; it also has abysmal speed in order to sweep effectively. I would suggest another sweeper w/o a grass weakness. Also, why didn't you choose Rhyperior instead? You're not giving it Eviolite, so why aren't you using the final evolution? Having said that, Rhydon doesn't benefit from Eviolite anyway, since it's not suitable to be a wall due to too many weaknesses.
Steelix is another RU Pokemon, weak to the same things Metagross is weak to plus fighting as well. If you want another Steel type, go either Heatran, Jirachi or Bronzong. Steelix also has a mediocre base attack of 85 along with a depressing speed of 30, and you need to do better than that in OU. Investing max EVs in speed is a waste of your time and effort. You also already have a physical sweeper in Metagross, you should consider a special one.
Metagross @ Life Orb
Ability: Clear Body
EVs: 252 Atk, 252 Speed, 4 HP
- Zen Headbutt
- Ice Punch
Dynamic Punch is only worthwhile on Pokemon like Golurk, since it has No Guard. 50% chance of hitting is rubbish, and will cost you the game.
Metagross has an advantageous typing, which will give it enough time to set up Agility and then sweep. Ice Punch is there to deal with Dragonite and Salamence, Zen Headbutt for STAB, and Earthquake to deal with other steel types that will otherwise wall you.
EVs: 252 HP, 252 Sp. Def, 4 Def
- Stealth Rock
- Rapid Spin
- Reflect/ Toxic
Basic set for Claydol. Quick Claw is a gimmicky item that's annoying when it works and annoying when it doesn't. Use Leftovers instead. Snore is a pointless move with a base power of 40, and if you wanted Rest then you might as well use Rest/ Sleep Talk, but Claydol has better things to do than that.
Reflect is there to up its defence and prolong its time on the battlefield, or Toxic for status ailment. Claydol is a good rapid spinner due to levitate and stealth rock resistance.
You can consider Starmie in favour for Claydol, because of Natural Cure and Recover. Or Hitmontop due because of your Dark weaknesses. But Claydol is good enough if you want to stick with it.
EVs: 252 HP, 252 Def, 4 Sp. Def
- Shadow Sneak
- Destiny Bond
- Will-O-Wisp/ Toxic
- Pain Split
Dusclops main usage in OU is due to the fact that it can wall even its weaknesses with Eviolite. Will-O-Wisp will cause a drop in attack, Pain Split to replenish HP, and Destiny Bond to take something down with it.
You can choose Toxic instead, since Jellicent has Will-O-Wisp.
Ability: Water Absorb
EVs: 252 HP, 128 Def, 128 Sp. Def
Will-O-Wisp your opponent, and then keep Hexing them. Hex gives x2 damage when the opponent has a status, so it's does damage more than Shadow Ball.
I am not a fan of gems/ plates in most cases (exception is Flying Gem Acrobatics); they only power up either 1 type of move or are only 1 use. Go with long term items like Life Orb, Leftovers, etc.
You don't have have a Cleric either, so consider Blissey for a special defence, or Umbreon to cover your Ghost/ Dark weaknesses.
EVs: 252 Def, 252 Sp. Def, 4 HP
- Heal Bell
- Foul Play
- Protect/ Yawn
What Umbreon is weak to Dusclops can wall, and vice versa, so you can have a nice core going on here. Though, Umbreon allows special Pokemon to set up because it has little offensive value, so be careful.
Ability: Natural Cure
EVs: 252 Def, 252 Sp. Def, 4 HP
- Flamethrower/ Ice Beam
Ability: Serene Grace
EVs: 154 Atk, 154 SpA, 200 Speed.
- Body Slam
- Iron Head
- HP Ice
- Grass Knot/ Psyshock
Jirachi can serve as a mixed sweeper, which will cover your special attack slot. It can also Paraflinch your opponent into rage quitting. However, Jirachi will add another fire weakness to your team.