I always found Buzzwole to be a great sweeper, and this set may seem weird, but it works so well for me.
Sweeper Buzzwole @ Life Orb
Ability: Beast Boost. What? Were you expecting Scrappy on an Ultra Beast?
EVs: 252 ATK / 4 HP / 252 DEF
Nature: Adamant
- Leech Life
- Hammer Arm
- Earthquake
-...