Old ps1 era top 3:
I guess I'm just nostalgic here but I loved a lot of characters and things in this game. Recruiting 108 allies and making them join your cause, fix your castle and help winning a war against a tyrant, made the whole experience unforgettable.
Has triple setting of wild west/fantasy/sci-fi perfectly blended together, and it's both kinda original, but also has all the basic features that every solid jrpg should have.
Fantastic plot and huge robots mostly.
Not a game for everyone, but for those that like it, it's nothing less than a masterpiece.
I also like FF Tactics, VI, X, Chrono Trigger, Xenoblade: Chronicles, Legend of Mana, Legend of Legaia, heck even Legend of Dragoon was fun despite the cliches...
Theres' a lot of good stuff out there tbh, or maybe it's just me liking everything that has a story and it's fun to play, lol.
I think this question depends a lot on what you are looking for in an RPG. Checking any top 10 list for the SNES, PS1, PS2, etc. will give you a pretty good idea of the goldie oldies of RPGs.
I really enjoy the Star Ocean franchise. They give lots of incentive to explore everything and craft things, and most of them have a good story. My favorite probably being Star Ocean 2.
FF Tactics is always fun to play through. There are some other pretty decent tactics type RPGs out there like the Disgaia sereies, I really like Disgaia 5 - loads of things to do in that game.
The new Trials of Mana remake is pretty good and fast paced. DOS2 is a great game. Witcher 3 is one of the best RPGs in the last 10 years fo sho. Mass Effect series is pretty good, except for Andromeda - just don't even bother with that dumpster fire. The Tales of series have some gems, my favorite is probably the Tales of Vesperia DE.
If you're looking for realism, then Kingdom Come Deliverance is pretty cool. As for 1st person games, Skyrim and FO4 are both awesome and you can easily spend 100s of hours playing those games with mods if you want a new experience or new content. Skyrim especially has a lot really good mods that add completely new storylines to the game.
I've played and witness many form of RPG.
So far in my top list is still Elona (desktop PC).
Even though I never been able to finish it, it's been my favorite since the first time I played it decade ago.
The game is never ending and is still updating new content.
I'll add a 'recent' one: I got positively lost in Octopath Traveler's battle system (in the best way). The combat felt fluid, and stayed fun for the entire duration of the game, even if the stories of the 8 travelers themselves felt very trope-y. (Also, the music is great, and the visual aesthetic of the game just works IMO).