Amon Amarth (Melodic Death Metal)
Apocalyptica (Power Metal with Cellos)
Blind Guardian (Pre-Nightfall = Speed-Metal: Post-Nightfall = Power Metal)
Dark Tranquility (More of a melodic death, but it's power-metal to my ears)
Demons and Wizards (ehhh... I always saw them as Power, but PG6 says they're speed)
Dream Evil (A little of everything, to be honest)
Dream Theater ("progressive" metal, which generally means power metal with more synthesizers, in my opinion)
Edguy (Deffinetely power, but they get pretty fast as well)
Eluveitie (Celtic Folk-metal. Very heavy stuff, but awesome as well)
Elvenking (Folk-power-metal. Violins and flutes and stuff)
Ensiferum (Considered Viking Metal by most)
Epica (More of a symphonic power-metal, like Nightwish without the soprano vocals)
Evergrey (Not entirely sure myself. Less melody then power metal, but not quite fast enough to be speed)
Falconer (Power metal)
Gravity Kills (Not really metal, but you should like it anyway)
Hammerfall (power metal)
Helloween (Ehhh... once again, I have a hard time telling the difference. Power/speed)
Iced Earth (Speed, with dark melodies occasionally)
Kamelot (Best power metal ever. Screw all who disagree)
Korplikaani (More Viking-Metal, I think. Maybe it's folk... gah)
Liquid Tension Experiment (Basically Dream theater but all instrumentals)
Opeth (I know of little of these guys, but their mostly melodic death, I think)
Shadows Fall (Kinda metalcore, but still awesome)
Sonata Arctica (Power Metal)
Stratovarius (Pretty much power metal)
Turisas (Viking Metal)
Wintersun (I think Viking as well)


All listed alphabetically. Have fun.

EDIT: If you still dislike it PG6, go ahead and change as you see fit. You probably have more experience than I, anyway.