A few (well, a lot) more that spring to mind. TO has covered the NWOBHM, so I'll cross the Atlantic in the other direction with some US and Canadian bands (plus a couple of Euro ones). A few of these bands were probably early 90s rather than 80s, and some of them are not very heavy at all, but since the likes of Danger Danger have already been mentioned I'll go for it:
Y&T
Kick Axe
Fifth Angel
Crimson Glory
Blackfoot
Black 'N Blue
Cinderella
Coney Hatch
Aldo Nova
Lee Aaron
Helix
Headpins
Max Webster
Triumph
Night Ranger (first album is the best)
Streets (featuring Steve Walsh of Kansas)
Icon
Malice
Bonfire
Vandenberg
White Sister
Agent Steel
Metal Church
Rough Cutt
Ratt
Babylon AD
Steelheart
Riverdogs (featuring Viv Campbell on guitar)
Shadow King (also featuring Viv Campbell on guitar)
+1 to Giant
+1,000 to Badlands
Also in the very late 80s there were some great bands who weren't exactly metal but looked like they might be about to take hard rock music in some interesting new directions. Unfortunately they got swept aside with the hair metal bands when grunge took over:
King's X
Warrior Soul
Saigon Kick
Galactic Cowboys
Living Colour