Like
DnB said, I really don't know what earthquake would do except hit Garbador (love eq hitmonchan :3), as façade/superpower hits everything it really needs to.
Marowak with sucker punch would make it far more viable and I think it would be a massive improvement to give it any form of priority, not less the strongest priority move next to extremespeed.
I'm not really sure how i'd feel about hurricane charizard, sure, it'd be more powerful; but the accuracy loss kinda would bug me a bit. it'd still be pretty decent though.
Stunfisk with volt switch would be fun, though it still has trouble with lanturn which is annoying.
Solid rock omaster would mean that it could work just like carracosta, which would help it more as it'd be a far more reliable check to ground mons and tauros.
Just a quick summery of my thoughts ^.^