Jeez, Steelwing were the last band I was expecting to see on the Yahoo! Answers. I was all about obscure retro heavy metal tunes not too long ago. I'll hook you right up, dude. Below is a mixture of obscure bands of yesteryear and ye olde modern times. I'll also throw down some cool links to dudes who've got several more seasons worth of metal knowledge than myself.
Holy Grail - My Last Attack / Fight to Kill / Immortal Man / Chase the Wind
Benedictum - Within the Solace / Uncreation / Shell Shock / Wicca / Beast in the Field
White Wizzard - High Speed GTO / Over the Top / 40 Deuces
In Solitude - Witch's Sabbath / Kathedral / Serpents are Rising / Demons
Icarus Witch - Draw Down the Moon / Out for Blood / Written in the Stars
Portrait - Bloodbath / Beast of Fire / The Nightcomers
Scorpions - The Zoo / He's a Woman, She's a Man / Lovedrive / Blackout
Accept - Balls to the Wall / Fast As a Shark / London Leatherboys
Raven - Faster Than the Speed of Light / Bring the Hammer Down / Hard Ride
Cloven Hoof - Cloven Hoof / The Gates of Gehenna / Night Stalker / Layin' Down the Law
Angel Witch - Angel Witch / White Witch / Angel of Death / Sweet Danger
Saxon - Strong Arm of the Law / Wheels of Steel / Motorcycle Man / Denim and Leather
Helloween - I Want Out / Eagle Fly Free / Halloween / Paint a New World
Flotsam and Jetsam - Hammerhead / Doomsday for the Deceiver / Saturday Night's Alright for Fighting
Savatage - Hall of the Mountain King / Before I Hang / Devastation
Faster Pussycat - Bathroom Wall / Don't Change That Song / House of Pain
Iced Earth - The Reckoning / Red Barron / When the Night Falls
The Last Vegas - Whatever Gets You Off / Loose Lips
Falling Red - Come on Down / If You Ain't Down With the Rock
Whitesnake - Slide It In / Wine, Women, an' Song / Gambler / Slow an' Easy
Grim Reaper - See You in Hell / Rock You To Hell / Fear No Evil
Blue Oyster Cult - Seven Screamin' Diz-Busters / Flaming Telepaths / Hotrails to Hell
Mercyful Fate - Black Funeral / Into the Coven / Evil / Melissa
Omen - The Axeman / Battle Cry / Into the Arena
The Hell City Glamours - One Night Only
Ram - Lightbringer / Sudden Impact / Under the Scythe
Enforcer - Black Angel / Midnight Vice
Cauldron - Chained Up in Chains / All Or Nothing / Torture's Too Kind
Goat Horn - Rotten Roll
Skull Fist - Sign of the Warrior / Ride the Beast
Jag Panzer - Warfare / The Crucifix / Eyes in the Night
Overkill - Rotten to the Core / Nothing to Die For / Hello from the Gutter
Testament - Practice What You Preach / Into the Pit / So Many Lies / Return to Serenity
Rush - Spirit of Radio / The Trees / 2112
...Well, that should do er' as far as bands from my own knowledge goes. As promised above, I'll lay down some links to some cool sites to check out for more hard rock and heavy metal.
Chromium Dioxide's Facebook Page (Indie Heavy Metal/Horror Mag from Canada)
http://www.facebook.com/pages/CHROMIUM-DIOXIDE-METALHORROR-MAGAZINE/310873065555
The Great Southern Brainfart (Probably my favorite music blog. This dude knows his stuff.)
http://thegreatsouthernbrainfart.com/
Happy Listening. Keep the Faith.