Hmmmm....you cant have a pumpgun, because of games medieval setting...
So i would like to have a crossbow or an arbalest.
Remember, that it was so powerfull, that a peasant could pierce a knights armour and kill the knight with one shoot or heavily injure him, so that the pope forbade its use to preserve feudal control.
If there will be no arbalest or crossbow, this will still be ok, but if there will be one and it just dimishes health by one fifth or even less, i will consider it a childish mess

A chain with a spicked ball would be another good choice, because its a weapon of the true evil ones

Or long claws on both hands, so that i can attack with one hand, while parrying with the other

or a lightweight speer, so that it is quick an has got some range
would be cool, if you could buy or craft daggers with a hollow handle, so to put it on a stick and quickly make a speer, if it serves you better..
But anyhow, it depends all on the figthingsystem. Noone would like a weapon, which looks cool, but you are looking dull, because you get your ass spanked in pvp or pvm.
So lets hope, the fightingsystem wont turn out to be a dice-fixed mess,
some old incrusted heritage from AD&D