Yup it's basically DQXI, it has every cliche of the golden era JRPGs you can think of (that were probably created by DQ to begin with).
Octopath Traveller and Bravely Default are pretty much spiritual succesors to FFVI and V respectively.
Fantasian by Hironobu Sakaguchi and Nobuo Uematsu is basically a full comeback to the PS1 FF formula (VII VIII and IX) it even has random battles and new techonology to bring back the long lost art of pre rendered backgrounds.
The Alliance Alive brings back the usage of overworld map and other more obscure mechanics like SaGa's levelling system or weapon skills like in FFIX, also the story was written by Yoshitaka Murayama (Suikoden series).
I am Setsuna and Lost Sphear are also basically spiritual succesors to Chrono Trigger, atleast in terms of battle system, I am Setsuna also has a very similar story to FFX.
Undertale, you've probably heard about this one, it's heavily inspired by Nintendo's Earthbound and an obscure JRPG called Moon: Remix RPG Adventure in which you were supposed to befriend enemies rather than fight them.
Trials of Mana is a remake of a japan only SNES JRPG called Seiken Densetsu 3, it's amazing especially if you like Action JRPGs.
World of Final Fantasy It's basically a combination of old school FF and Pokémon.
The Trails series I wouldn't say they're old school, but mainly because Falcom has remained faithful to their mechanics so it's in a similar vein as DQ, they just stick with their roots and only try a handful of new things with each release unlike FF for example, but I can see why some are mentioning them, especially if they just discovered the franchise.
Also I guess I should give a shoutout to Mobile JRPGs, Another Eden is a Gacha RPG written by Masato Kato (Chrono Trigger) and it does have a Chrono Trigger vibe going on, another Gacha game I need to give a shoutout to is Granblue Fantasy believe it or not the Gacha game that started it all is actually pretty much an Old School JRPG in disguise, it has a very complete story and a lot of the staff behind the game worked on Square Enix previously, so they know their JRPGs.
KEMCO, is a company dedicated to making old school JRPGs for Mobiles, they then port them to console, you've probably seen some of their games if you've ever browsed through the RPG categories on any console, their games are hit or miss but I've actually been able to enjoy some of them, my personal favorite from them is Monochrome Order, it's turn based and it has a very dark and interesting story, the only JRPG I can compare it to is Shadow Hearts probably.
The only other game I have in mind is Star Ocean 5, it's probably the worst game in the franchise but unlike the Tales series, the combat has remained almost untouched so it has an old school action RPG vibe, I'd say if that's your thing you should give it a shot, but in general it's not a good game.