Tales of Berseria is very nice, it makes for a great change to play as a team of protagonists who aren't purely heroic. Tales of Zestiria is pretty OK too, and has a bunch of ties to Berseria because it's set in the same world, but is the inferior game, so only go for it if you really love Berseria. Tales of Symphonia is probably the best Tales game, and it's on there now, though I don't know how good the port is.
The PC ports of FFVIII and FFX are nice too, I wouldn't recommend FFIX though, it's a lot uglier than how you can get it to look on an emulator. FFV and FFVI are a total shitshow, they're ports of the mobile versions, so you're better off playing them elsewhere too. FFIII and IV are alright though; I think they use spruced up assets from the Nintendo DS versions (though I'm not sure) so they don't look utterly dreadful, and they're nice enough games.
The Trails series is remarkably good, but it does take a long time for the first game to get into its stride. If you stick with it it pays off in a great way though. If you're only going to get one I'd say pick Trails of the Sky, but if you're looking for a quicker payoff go with Berseria or one of the Final Fantasy games you haven't played.
