Ok so I have returned!
First of all Phantom. 60s band, nice and creepy. Sounds kind of like The Doors but more focused on occultish stuff. Best song (in my opinion) Spiders Will Dance On Your Face While You Sleep. Quite the title eh?
On MySPace there's a band called Riders of Oblivion, while not originally from that era they sure as hell sound authentic. In fact, John Gallo from Orodruin (excellent doom band) is involved, and anything he does I tend to absolutely love.
Lucifer's Friend might be another good one to try.
I believe you may have interest in Warhorse as well. There's 2 Warhorses, I'm pretty sure you'll be able to tell the difference though!
Alot of people constantly praise Dust as well. You should certainly check them out!
Bloodrock-Concern yourself with the first few albums and all will be dandy.
Really If you haven't bothered with Uriah Heep, get Demons and Wizards or Magicians Birthday. Return to Fantasy is good too but only if you like those other two. Only David Byron is tr00.
The Crazy World Of Arthur Brown gets thrown into this catagory as well, and for good reason. It's very groovy.
There's a 60s band called Art, the only song I have from them is called Supernatural Fairy-Tales and it rocks.
Heavy Jelly. I personally think the name speaks volumes.
There's a band called GAA (there's umlauts over the first A). They're more prog rock from the early 70s but it's still very cool.
Jane falls into this catagory easily but is also very proggy. While Heaven Wept had done a "cover" of one of thier songs on Empires Forlorn (the song was Voice in The Wind).
Karthago is a good one. Kind of a cross between Cheap Trick and Kansas. :D
Hopefully some of those may strike your fancy!