Impressive selection so far. I have a few more ideas to add
Luxray
Spark/thunder fang
Thunder wave/swagger
Iron Tail
Crunch/Return
Spark and thunder fang for STAB, thunder wave or swagger to cripple the opponent. Finally, iron tail, crunch, and return to cover whatever else you might come up against.
Rhyperior
Stone Egde/ Rock wrecker
Earthquake/earth power
Megahorn
Swords dance/rock polish
Stone egde, rock wrecker, earthquake, and earth power for STAB. Megahorn has some amazing power, and will KO any grass, dark, and psychic types. For power ups, it has a boost in speed or attack. Thunderbolt gets a meition here because it takes care of water types.