reptiles to go in rack system

So my boyfriend has a rack (large sized ones big enough for a female ball) but is only using a few of the shelves. So what I'm wondering, is what lizards I can put into the same rack as the ball pythons. Besides leos.

The only other one I can think of off the top of my head is fat-tails. Most lizards will not do well in a rack system using tubs.