I'm surprised Max is the only one who mentioned Chrono Trigger. Tbh, I'd love a remake of that but I'd actually be fine with an HD Remaster of DS Trigger and Chrono Cross together in a package for PS4, Switch and Steam. Trigger honestly still works in its artstyle and can easily be upscaled or whatevs - it's Cross that would need the most work, and I'd love to see them make it look current gen. Not even fancy, just at least FFXIII level of pretty.
Ephemeral Fantasia is a game that could benefit both from a remake and, potentially, a different development company entirely since it's a Konami JRPG title, but had a lot of potential. I loved how it was essentially a Majora's Mask-inspired JRPG with, oddly enough, Guitar Hero minigames with your weapon before Guitar Hero even existed. The story, characters, and gameplay all have potential, and seeing as how it's a dead IP, I'd love to see someone redo it or do a spiritual successor.
FFVIII desperately needs a remake after the VII saga is done, considering the only real developed lead in that game is Rinoa and the gameplay can leave a bit to be desired. Tbh, I'd love to see it be remind with three gameplay options - an updated version of the game's original system, a FFX-style system, and a FFXIII-style system. That would never happen, but boy would I love that. Also, way more character exploration for everyone other than Squall and Rinoa, and for them to properly develop Squall instead of having him go from a loner dude to a co-dependent character.
Oh, and FFII/V/IV deserve a III/IV style remake.
Oh, but the best game of all that needs a remaster (not a remake!) is KH V-Cast. KH V-Cast HD for Vita, pls. Let's spread some more KH titles out on more systems, Square. The fans demand it.