I have cooked up over the years the mother of all weapon ideas thread, all divided up via class (but not by weapon slot, unfortunately). Years worth of weapons thought up by me, mostly competent, sometimes jokingly.

http://www.gamefaqs.com/boards/437678-team-fortress-2/70855773

I implore you to browse through these weapons, with a coke and some cheetohs, and surf through all these weapons. There's good stuff in there that I think this server would greatly benefit from.