Will try to avoid already mentioned ones.

Dio
Black Sabbath of course and Ozzy Osbourbes' solo career
Megadeth (start with Rust In Peace)
Sabaton
WASP
Theocracy
Stryper
Motorhead
Beast In Black

Some Queen songs are metal, like Breadfan and Princes of the Universe and Gimme the Prize

I have way more but don't want to overwhelm