Baldur's Gate is still one of the best games. Well two of the best games:
https://www.gog.com/game/baldurs_gate_2_enhanced_edition
https://www.gog.com/game/baldurs_gate_enhanced_edition
Wasteland if you are more into apocalyptic settings:
https://www.gog.com/game/wasteland_2_directors_cut_digital_classic_edition
Pillars of Eternity and Divinity: Original Sin are also great:
https://www.gog.com/game/pillars_of_eternity_hero_edition
https://www.gog.com/game/divinity_original_sin_enhanced_edition