I was bored and compiled a list of JRPG games on TA with the most users. I might've missed a few, but I figured I'd share
Monster Hunter: World - 189,476
Final Fantasy XV - 140,269
Dark Souls III - 99,732
Kingdom Hearts III - 90,210
NieR Automata - 74,285
Dark SOuls II: Scholar of the first sin - 59,325
Final Fantasy VII - 42,875
Code Vein - 30,604
Dragon Quest XI - 29,939
Dragon Ball Z: Kakarot - 27,806
Sword Art Online: Fatal Bullet - 27,016
Phantasy Star Online 2 - 25,294
Onigiri - 26,314
Dragon's Dogma: Dark Arisen - 22,349
Final Fantasy IX - 20,218
Kingdom Hearts 1.5+2.5 Remix - 17,128
Final Fantasy VIII Remastered - 16,362
Final Fantasy Type 0 - 15,590
Tales of Vesperia HD - 12,976
Final Fantasy X/X-2 - 10,212
Yakuza Like a Dragon - 8,454
Final Fantasy XII - 5,935
World of Final Fantasy - 5,914
Kingdom Hearts 2.8 Final Chapter - 5,463
Shining Resonance Refrain - 5,402
Valkyria Chronicles 4 - 4,512
Valkyria Revolution - 3,432
Romancing Saga 2 - 889
Romancing SaGa 3 - 166
Just keep in mind the FF and KH ports were so late to xbox lol Also being an achievement community they are less likely to play JRPG's because the list tends to be hard. Sega got screwed