For the best of both worlds try getting your hands on a copy of The Dark Eye (Das Schwarze Auge 5. Edition for the original German version). On the surface it has a ton of classes but in reality those are just suggested presets on top of a classless system and you can freely mix and match almost anything with very few restrictions.

For some reason TDE hasn’t really taken off internationally but it has been the most popular TTRPG in Germany for over 30 years, beating even D&D. 5th edition is available in at least English and I think some other languages as well. The focus is on a rich fantasy world that has consistently evolved since the 80s and a rule system that is a bit less combat-centric than D&D.