All I can think of would be female fat tailed geckos. I have kept up to 3 females in the same enclosure without any issues.

But the same issue would arise as with any multiple animal enclosures. If one gets sick, parasites, etc, you end up having to treat everyone. There can be fights or one animal can intimidate the other(s) into not eating properly, or stress them, causing health issues.

I'd advise a ton of research before you jump into putting any animals together, especially multiple species, which I don't think I'd ever recommend.