well 80 gallons is anice sized aqaurium.what you wnat to remember when mixing species is they need to be around the same size so one does not get eaten.also you wnat to make sure you know when the animals are active.it is good to have a night time and a daytime animal.or you can have arboreal and ground dwelling lizards as with your skinks and anoles.in an aqaurium that size you have more options than that.i have a 65 gallon reptarium that i used to keep 2 fence lizards,a racerunner,adn a few ground skinks in(dont mix things with ground skinks).ground skinks are bad because they either become food or die of stress(mine died that way).some good arboreal species are
anoles,house geckos,crocodile geckos,bibrons geckos,green tree frogs
good ground lizards are
armadillo lizards,leo geckos,flat lizards,small skinks
remember that before you choose your animals choose the type of habitat you want to set up.once you do this find out wich types of animals are suitable for this type of habitat.hope this helps and if you have any questions just ask
nick