I see what your saying.
How about Pure Power ability and 140 atk? And Sheer Force might be good. Granbull gets Close Combat, Ice Fang/Punch, Fire Fang/Punch/ Thunder Fang/Punch, and Superpower. So that would do just fine as well.
And i'll add these.
Mega Beheeyem
Type: Psychic
Ability: Analytic
Stats: 75/85/100/140/120/20
Mega Crawdaunt
Type: Water/Dark
Ability: Tough Claws
Stats: 63/145/95/115/70/75
^Possibly overpowered