If you are asking for a special sweeper.then the winner is ampharos.Its base stat is 115 and electivire is only 95 in special attack.But electivire has got better stats than ampharos and has a large movepool.If i were you i would go for electivire because its overall stats are even better than ampharos.The choice is yours.
Electivire (M) life orb
Trait: Vital Spirit
EVs: 252 SAtk / 4 SDef / 252 Spd
Modest Nature (+SAtk, -Atk)
Discharge
Focus Blast
Psychic
Hidden Power [Ice]
special moveset
Ampharos (M) @ Leftovers
description
Role: Bulky Sweeper
Trait: Static
EVs: 120 Def / 252 SAtk / 136 Spd
Modest Nature (+SAtk, -Atk)
Agility
Thunderbolt
Hidden Power [Ice]
Power Gem
