your tank, being a corner tank, isn't very large at all, even thoughs it's 80 gallons
realistically anything more than ONE of the fish you seem to be interested in would be cramped...
try smaller fish like basslets, filefish, snarpenose puffers, anglers, lizzardfish, hawkfish, and such
they have all the same character as larger fish but could actually make an interesting tank, instead of just 1-2 fish sitting there
hawk fish, gobies as ,blennies wld be nice u clg get alot of those in there. Assuming u dont put the same color blennies and gobies in it starts confilcts between them...