Well I know of a few Pokemon that might be used on them. These do not include starters or legendaries. Here thay are:
Normal:
Dunsparce
Linoone
Granbull
Bibarel
Bouffalant
Rock:
Golem
Sodowoodo
Lunatone
Solrock
Aggron
Tyranitar
Bastiodon
Gigalith
Carracosta
Rypherior
Ground:
Sandslash
Dugtrio
Mamoswine
Hippowdon
Gliscor
Wishcash
Seismitoad
Donphan
Fighting:
Machamp
Medicham
Hariyama
Sawk
Throh
Hitmonlee
Hitmonchan
Hitmontop
This is about the extent of what I have seen. You always can use any other Rock, Ground, Normal, or Fighting Pokemon. I just gave my two cents and will let someone else give theirs. :)