What reptile can live in a 25 gallon glass terrarium?

I’m about to go buy a new terrarium for my Red tailed boa, so I’m going to have an empty 25 gal. glass terrarium, I want to get another reptile, prefferably a lizard because i already have a snake, I would like to get something small, i dont not want anoles, had them before they were not very interesting, I’m thinking about either leopard gecko or maybe someother type of gecko,or a bearded dragon. Input please!!!