Considering I lived through NWOBHM, and saw all the best bands, I should point out to you that Manowar are American, Motorhead and Judas Priest were around circa 1974-76 and definiitely not NWOBHM, you are only left with Iron Maiden And Saxon.
why you bother to post these polls when all probably in EARLY 1980's you knew or know nothing about the subject matter surprises me.
The best bands apart from Def Leppard and Maiden, who were around in 1979, were Diamond Head (with the magical riff Am I Evil and Call me),
Tygers Of Pantang, Tank, Girlschool, Anvil, Angelhead, Budgie (who enjoyed a revival with this movement), Raven and Wytchfynder General.
There were others but the above were my faves.