Personally, I love hair metal. It's fun music to listen to and doesn't ask too much of its listener (simply asks for you to have a good time) which, sometimes, is all I want from music.
Guns N' Roses is not hair metal. They have some 'hair metal-ish' songs but the majority of their output is nowhere near hair metal.
Considering Bon Jovi still have a career, still sell millions of records and remain relevant, I wouldn't list them here either as they have surpassed the hair metal genre.
Motley Crue is the definition of the 80's hair metal band, which is ironic since they were always desperate to be respected as musicians and be seen as rebels of some kind.