Some of my favourites are Baldur's Gate 2 (have not played 3 yet) and KoTOR's Bastilla. I also liked what Owlcat did in its Pathfinder and Rogue Trader games (I am actually playing RT) - there were some truly unique concept, not just "be nice to pretty girl".
I'm so bad at romance, I couldn't even get a date in sex camp (Baldur's Gate 3).
Honestly, I haven't really found an RPG that I thought did it extremely well other than maybe The Witcher 3, where it felt organic instead of manufactured.
Usually romance systems just make me uncomfortable. Either I have to reject someone, which I don't like doing, or I become a sex starved prevert making inappropriate advances.