Although Trouble did not consider themselves "white metal" they were clearly Christian Metal. "Psalm 9" and "The Skull" are both classic. They released a limited number of white vinyl LP's for Psalm 9. Trouble is one of the best Black Sabbath influenced bands.
I'm an old-school fan and the Bay Area scene was a big part of the picture when I first got into metal. Even if its not your cup of tea a metal fan should respect what has evolved from the Bay area in the mid-80's. These are some of my fav's: Slayer - Show No Mercy (they were still Bay Area in 1983)...
I consider Budgie pre-NWOBHM and recommend the album Bandolier in particular (not just for the cool artwork on the cover).
I think Diamond Head falls into this category but I never really got into them.
I've never heard the material on "This Time" because all of the reviews were so horrific. Is it really that bad?
It wouldn't be the first time that a band fell off a cliff after releasing a classic (Power Games in this case).
Sortilege had the best vocalist (Christian Augustin).
Vulcain was killer but their vocalist has been described as "Lemmy with a mouthful of warts".
These 2 were my favorites but H-Bomb isn't far behind.