I recommend you don't fool with sculpin. They make poor community fish, as they will eat other fish up to their own size, and as said are very picky about water conditions. If you really love them you could set up a species tank with a chiller (or in a cool basement) and plenty of oxygenation.
If you want a different native bottom-dweller, look into darters. The Etheostoma species are bottom-huggers, just like sculpins, and there are many species with strikingly different patterns and colors, so you'll be sure to find one that appeals to you. Percina species are also handsome fish, but are less bottom-oriented.
Are you looking to set up a community tank? Rock bass will gobble up any darters, sculpins, or other small fish. However some sunfish, such as longears, orangespots, or redspots, make good community fish so long as your other fish are large enough. I currently have subadult dollars and redspots with various minnows, and they are doing fine.
I have no experience with adult rock bass (just got a YOY!) so I can't say much on how they do with other large fish.