If you want retro options, some fun virtual console RPGs are: The first two SNES Breath of Fire games, and Pokémon Blue/Red/Yellow/Gold/Silver/Crystal for GB/GBC virtual consoles. The GBC Lufia game is also on there by the way, though I don't know if it's any good...
If you wanna dabble in Sega Game Gear stuff, Shining Force: The Sword of Hajya is a strategy RPG, and was later remade as Shining Force CD. Another SRPG for Game Gear that's on the eShop is Crystal Warriors. Think of these as if they're early GBC Fire Emblems, I guess.
Also, the next Radio Free Nintendo retroactive episode will be on Crimson Shroud, which is a 7~ish hour RPG. Might be fun if you like contributing some thoughts to the show?