1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.

U.D.O. (23)
UFO (26)
Ugly Kid Joe
(7)
Umbra et Imago
(13)
Uncle Slam (3)
Undertow
(3)
Unearth (8)
Unisonic (4)
Unleashed (14)
Unsane (12)
Uriah Heep (41)