Suikoden!!!!

jRPGs only, or are wRPG also eligible? If so, Ultima 3, 4, 5, 6, 7, Savage Empire and Martian Dreams; Fallout 1 & 2; Wasteland; Planescape: Torment; and many more.

Phantasy star iv

@lpslucasps maybe ill look into wrpgs with this list at some point but for now i kinda just wanna focus on jrpgs. specifically stuff that draws from the legacy of final fantasy and dragon quest III

The Etrian Odyssey series has 5 party members, and Pokemon has up to 6 (if that counts?)

Revelations: Persona, Persona 2: Innocent Sin, and Persona 2: Eternal Punishment all require 5 active party members!

Lunar: Silver Star Story Complete and Soul Hackers

NEO: The World Ends With You

star ocean: integrity and faithfulness
labyrinth of refrain: coven of dusk
labyrinth of galleria: the moon society
the last remnant
blue dragon
fairy fencer f: advent dark force
final fantasy xv (if you're countin temporary party members)
final fantasy iv: the after years
lost odyssey
romancing saga (possibly romancing saga 2/3 too? but def 1)
metal dungeon
the alliance alive

Albert Odyssey: Legend of Eldean 🙂