This is one of my favorite genres, though my particular favored variants of it have dissipated quite a bit in popularity in the past couple decades. I'm more into the old Swedish variants (earlier In Flames, Dark Tranquillity, At The Gates, as well as more modern-ish stuff like Soilwork, Scar Symmetry, Solution .45). I'm more selective about the Finnish doomier or neoclassical variants (Insomnium or Children of Bodom, for example, who are good, but not quite favorites), though I especially enjoy Amorphis, and Noumena, who are something of a hybrid. A lot of my absolute top ones are rather under the radar now though, like Mercenary, Nightrage, Daylight Dies, Eventide, Satariel (especially their album Phobos & Deimos with Messiah Marcolin of Candlemass guesting), and Deadlock.