I'm new here, but i have seen a few metal bands over the last 17 years.
Here a list of the ones I can recall:
AC/DC (4 times)
Accept
Amored Saint (3)
Black Sabbath (W/ Ozzy, Dio & Ray Gillen)
Celtic Frost
COC
Dio (4)
Iron Maiden (W/ Bruce 4 times 1 W/ Blaze)
Judas Priest (3) 1 W/...