Short Blade:
Black Hands Dagger(obtained from being Grandmaster of the Morag Tong)

Long Blade:
Gravedigger(kill the captain of helseths guard)
Eltonbrand(recieved as a vampire)
Shadowsting(found in a hollow tree-stump, behind Thirsk Mead Hall, on Solstheim)

Blunt Weapon:
Light of Day(Aundane Vampire)
Mace of Molag Bal(do his quest)
Mace of Aver Stone-Singer(obtained during Bloodmoon MQ)

Axe:
Nordic Silver Battle Axe(carried by Tharsten Heart-Fang)
Daedric Battle Axe(random dremoras)

Spear:
Spear of Bitter Mercy(Shegoraths quest)
Spear of the Hunter(choose Guile at the fight w/ Hircine)

Marksman:
Daedric Longbow(in Melekishishi, forgotten galleries)
Bow of Shadows(Venim Ancestral Tomb)
Auriels Bow(Ghostgate, tower of dawn, ordinator to the right on the top floor)
Fine Spring Dart(found on Black Dart Gang members)