Need help deciding on fish!

[TylerOSU]

Hey guys, just got a 75 gallon fish tank that I let cycle, with sand and a few plants thus far. The only fish I have in there now is a peacock eel but I think he may be sick. Im really tending to him and I have talked to my local pet store about it but thats a different story. So my question is, what are some cool fish that you all would suggest to fill my tank? Im not big on schools of fish, a pair or maybe 3 or 4 of a certain kind is fine, but I like interesting and different fish. So help me out guys!! I plan on buying my next fish in about 2 weeks so I wanna make sure I know what I want before start buying. Thanks everyone.