Hmm let me see... I love chromis, pretty cheap and they school. I had 5 blue reef chromis and they were very cool. I also had anthias, another great fish. I;'d look at a blenny and goby as well, they arent just for small tanks lol. I would look at larger shrimp gobies though not the tiny ones and blennys are a good enough size that they wont get lost in such a big tank. There are so many options, it's based on what you like though. What colors do you want to add, do you want swimmy type fish or ones that perch. Oh, another great fish with a ton pf personality are flame hawks but they can eat smaller shrimp. I love my hawk, he just perches and watches you and will follow you around. I named mine sumo.
lawnmower blennys are very cool, and they can help with algae too. Thats a fish with alot of personality.
jawfish are neat too but you may not see them as often as you'd like as they dig a hole and pretty much live in it. lol
If ypu are going fish only then there are a ton more options too. Oh almost forgot, wrasses are a good addition as well though ypu might want to have screening in place when having them