Here is 5+1 great status abusers:
Sableye @ Leftovers
Trait: Prankster
EVs: 252 SDef / 248 HP / 8 Spd
Careful Nature
- Taunt
- Will-O-Wisp
- Foul Play
- Recover
With Prankster, Will-O-Wisp gets +1 priority, almost ensuring something will get burned, and it can stall for extensive periods of time with Recover. At the same time it can completely shut stallers and setup sweepers with taunt. Those 8 Speed EVs are to outspeed other Sableyes.
Breloom @ Leftovers
Trait: Technician
EVs: 4 HP / 252 Atk / 252 Spd
Jolly Nature
- Spore
- Swords Dance
- Bullet Seed
- Mach Punch
As if 130 Attack and awesome dual-STAB wasn't enough, Breloom gets Spore, one of the best status moves of all time. The process is simple, use Spore, get one Sword Dance up (possibly 2) and sweep away.
Rotom-Wash @ Leftovers
Trait: Levitate
EVs: 184 HP / 4 Def / 144 SAtk / 176 Spd
Modest Nature
- Hydro Pump
- Volt Switch
- Pain Split
- Will-O-Wisp/Thunder Wave
Hit hard whilst crippling stuff into Oblivion. This guy can be incredibly annoying to take down.
Ferrothorn @ Leftovers
Trait: Iron Barbs
EVs: 252 HP / 68 Def / 168 SDef
Impish Nature
- Spikes
- Stealth Rock/ Leech Seed
- Power Whip
- Thunder Wave
The Lord of the Setup, crippls anything daring to stand against it. The rest of the moves are for further setup.
Jirachi @ Leftovers
Trait: Serene Grace
EVs: 224 SDef / 252 HP / 32 Spd
Careful Nature
- Thunder Wave/ Body Slam
- Iron Head
- Wish
- Protect
The undoubted King of Status, being able to stall almost anything into a rage-quit.
Heracross @ Flame Orb
Trait: Guts
EVs: 252 Spd / 252 Atk / 4 HP
Jolly Nature
- Megahorn
- Close Combat
- Facade
- Earthquake/ Stone Edge/ Nigth Slash/ Pursuit
Maybe not a status-inflicter, but rather one that abuses status ailment itself and absorbs any status-move for its allies. Activated Guts+ Heracross fantastic Attack/Speed= One mean, lean, killing machine.