I don't tend to like many sleek or elegant Pokemon, which has historically made me somewhat cool (har har) on Fire-types, but on reflection there's quite a handful that don't fit that mould.
1: Darmanitan. Has sat comfortably in my top six since the Gen V spoiler season. His psychotic grin, his psychotic power, his gait, the fact that you can catch him early enough for him to pull his weight in a run-through, the fact that no in-game NPC really makes much use of him - I love it all.
2: Ho-oh. Not only was Gold my first game, but Ho-oh continues to be powerful and interesting in a way that very few box-art legendaries are. An extremely powerful physical attacker, with an excellent offensive typing, that's 4x weak to Stealth Rock... that spreads status, has multiple forms of reliable recovery, and generally plays defensive roles? Count me in. Strangely, it's also benefitted from relatively little anime attention until quite recently, so it still possesses a veneer of mystery and exclusivity in my mind's eye.
3: Emboar. Massive points for turning most Fire-type tropes on their head, and I love the color palate. Oink oink SMASH.
4: Coalossal. I'm firmly on the 'should-have-looked-more-like-a-train' train, but as a lover of gnarly Rock-types and a big Galar fanboy, this guy natually scores pretty highly regardless.