okay here’s some:
high clear - sports/college romance
it’s just a dream… right?! - supernatural shaman stuff, red haired character is a huge green flag
jazz for two - school life, but super deep i loved it
homerun hearts - simple short story about childhood friends to lovers
placebo crush - another short one, slice of life
first kiss, first love - enemies to lovers/college life
a fleeting spring dream - fantasy. prepare yourself.
do not press the plum - short, good art, good story, red haired character isn’t evil or nthn but he’s going through things
(all of these are BL’s)

Everytime I think of red haired characters, they always end up being rotten people. So I'm just looking for any red heads that are good people. Genre doesn't matter, I'm open to anything :D
I can only think of one and it's that red haired fireman from the if you can series!