I'm probably not the best person to represent the genre, with not being what you call a "metalhead".
Still, I spent a lot of my time listening to the different generes of music and metal is a pretty big chapter in that book. So what I lack in information, I may make up with unbiasedness (what a nice word).
Nowadays I listen mostly to soundtracks and some classical music, but I'll try to share the bits off the top of my head.
I'd also like to mention, that I simpy enjoy the music and had no interest in the metal scene or the appearance of the artists.
The point I'm trying to make, is that metal doesn't have to be "grimdark", with incomprehensible growling and dissonant tunes, as the stereotype most people hold against it.
Eluveitie - Folk metal; Folk instruments nicely blending in with electric guitars. Some of their songs also feature an amazing female vocalist.
Na Regv NaSlanias SongMind you, the first one is rather unusual, but the second one is a good example of the average course of this band.
They also have faster and more agressive ones, but I found those less appealing.
Soil - Alternative Metal; Their songs always feature a moving (the way I percieve it) chorus. Left a strong impression on me.
UnrealObsessionKorpiklaani - Folk metal; This time of a more cheerful sort.
Spring DanceMisty FieldsAlestorm - Pirate Metal; Draws from folk metal and epic metal, with (mostly) cheerful pirate themes and fast pacing. Catchy and sing-along choruses.
KeelhauledThat Famous Ol' SpicedPainkiller OST - Not really a band, but most of the tracks would classify as metal. The folloowing one would probably be Doom Metal. Quite atmospheric.
Bear me the LightMight add some stuff later. New Metal bands for example.