I recently cycled a 65 gallon tank.(48x13x24). Im thinking of doing a pair of clowns, either a valentini or blue spot puffer. Possibly a dwarf angle of some kind, thinking a flame. Not really sure what else to put in, possibly some gobies or filefish but i don't know. I have glass top on it, just didn't have them for the picture.
Are you planning on having coral too or fish only? Puffers might eat inverts and the dwarf angels might eat corals. What I did when planning my stocking list is just browse https://www.liveaquaria.com/category/15/marine-fish and read up on each one I was considering.