I don't know if it's lesser known, but it is often considered a bad game, Final Fantasy Mystic Quest. For most standards, I mean yeah, it is not good. It is not even considered a JRPG. Why do is it my favourite?
MQ was made and released as an introductory RPG, easy, simple and straightforward to play, It was literally my second RPG, my first one was Pokémon. As I kid I loved Pokémon and searched for more games of the genre, and I found the final fantasy games. English is my second language, and I found the FF games were too complicated for me to understand, but after trying most, I got into MQ.
Introductory games sometimes are necessary, I have played a lot of games in life, but MQ has a special place in my heart and it is the reason I love videogames and RPGs.