What goes with tiger barbs

So if I put a few more Tiger Barbs in the tank you think I might be able to put a peaceful fish in there. I had them in a smaller tank with a couple cory's and didn't realize how much fun the cory's could be because they stayed hid inside a cave most of the time. Now that the barbs are out the cory's don't go in the cave and the tank stays much cleaner.
I had thought about trying some cichlids but I don't know which one's stay small enough to put in a 35 gallon tank. I have a 55 I'm going to set up with cichlids later.
 
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