There's bulky as in tanks, and bulky as in walls.
Wall
Chansey @ Eviolite
Ability: Natural Cure
EVs: 252 HP, 252 Def, 4 Sp. Def
Nature: Bold
- Heal Bell
- Wish
- Protect
- Toxic/ Stealth Rock/ Seismic Toss
Still a great wall, but now she has to fear Knock Off.
Furfrou @ Leftovers
Ability: Fur Coat
EVs: 252 HP, 252 Def, 4 Sp. Def
Nature: Impish
- Return
- Cotton Guard
- Toxic/ Thunder Wave
- Roar
I mean, I guess you could go for a RestTalk set on Furfrou, but that would either mean being taunted or forfeiting a status move & Roar. Or you could bank on Furfrou surviving and just have Rest without Sleep Talk.
Tank
Snorlax @ Leftovers
Ability: Thick Fat
EVs: 144 HP, 188 Def, 176 Sp. Def
Nature: Careful
- Curse
- Body Slam
- Earthquake/ Crunch
- Rest
Classic Curselax; the set itself is pretty self-explanatory.
Porygon2 @ Eviolite
Ability: Trace
EVs: 252 HP, 252 Sp. Atk
Nature: Modest
- Recover
- Ice Beam
- Thundebrolt
- HP Fire/ Toxic
Aka, duck tank. Either HP Fire for some additional coverage on stuff like Ferrothorn, or Toxic to stall. Trace is more useful imo if you're using it defensively because it can trace stuff like Poison Heal or Flash Fire.