As mentioned ,Speris legacy is very zelda like, and quite pretty
Dragonstone & darkmere, owe a lot to JRPG, but like most Amiga games, are European feeling, rather than japanese.
Ultima 3 to 6 are available natively, and 7 is available through an interpreter.
Legend of valour is is 3D, and not a million miles away from the Eldar scrolls.
But really, the Amiga was a western machine, and you should try some of the best RPG titles that aren't JRPG based, maybe: Eye of the beholder, Dungeon Master, abandoned places, Ishar.
EDIT: I should read the thread properly, most of my carefully thought of titles, have been thought of by other people!
And some great point and click adventure games might fit the bill as well.
