Leo's are best kept on their own but females can be kept together if the viv is big enough and has plenty of hides, but I have found that getting females is difficult and if you buy young ones they are hard to sex and males will really fight. A group of females will also squabble but it shouldn't be a prob as long as the viv is big enough. I keep my male alone in a 3 ft viv(2ft is fine) and he looks happy. Cresties are easy to keep as are beardies or even rankins dragons it will depend on viv size and amount of money you want to spend.
1.0.0 Leopard Gecko "pascal"
2.0.0 Lhasa Apso "Frodo,Obi"