If you are searching for more classic heavy metal I know 2 very nice bands: Zed Yago from Germany. 89' "Pilgimage" Album is a classic. The first album is also nice "From over Yonder".
Crystal Viper from Poland are also very nice Heavy metal from nowadays I really loved "The Curse of The Crystal Viper" (2007), they have more albums but I lost a little track of them, maybe It's time to hear them again hehe.

Thrash metal classics Holy Moses are good.

For more Power/speed/thrash metal bands you have the incredible Debbie Gunn that sang in Znöwhite's album "Act of God" (1988) superb album. And her band Sentinel Beast that are now active (I saw them at Keep It True festival and they were awesome) with their classic "Depths of Death" (1986).

Another classic for female thrash Vocalist is Dawn Crosby (died in '96) and had very nice albums with Détente 1986 "Recognize no authority" and Fear of god 1991 "Within the Veil"

Hope that this helps You.