Its hard to answer because "Commercial" isn't a clear definition really...
I mean, in general, there were more "hair bands" that were commercial than "heavy metal" bands so it is easy to call hair bands commercial... but for example, Iron Maiden are a more commercial band than say, Spread Eagle or Trixter or even Treat, even though Treat have such a light, pop-metal based sound, they weren't a big band, with barely any exposure, therefore not commercial. Because Iron Maiden WERE a big band playing to mass audiences, with hit videos on MTV and top 10 singles, and Trixter and Spread Eagle weren't....
There are bands obviously like Poison, Crue, Warrant, Def Leppard, KISS, Bon Jovi etc who were huge and all over MTV, but you have to remember that the hair/glam scene was saturated with bands and most of them never made it out of Sunset Strip and are only hunted down by collectors and fanatics of sleaze & glam music, so they aren't really commercial...
I think there is a general feeling that all the hard rock/metal that is either lighter, glammier, sleazier, flashier, or less "metal" than the true metal bands, is more commercial... but when you define the word "commercial", that's not always the case. You can have commercial hits with any genre of music, be it heavy metal or light rock, and you can have non-commercial underground music in any genre, be it heavy metal or light rock as well. Some bands just prefer to write super melodic, catchy, keyboard soaked rock instead of heavy metal, not because it is more popular, but because they prefer that (as I do)...
Rant over though... some "hair bands" I would recommend who are alot heavier or more rockin & nasty than most of the popular MTV ones, would be:
- Spread Eagle
- Keel
- Roxx Gang
- Kix
- Ratt
- Shotgun Messiah
Etc..