Recommend me an old-school grindy, turn-based RPG

Hi all, I'm looking for a dungeon-crawler to grind away on while listening to some podcasts, preferably with mechanics in the vein of some of my favourites: classic DQ, Chrono Trigger, Breath of Fire, FF 1-10, Suikoden, etc.

Things I'm looking for:

• not too narrative/cutscene based - I want to play a game, not watch a visual novel (so no recs for Persona/Metaphor please, even though they're great);
• fast-paced, party-based, turn-based (or ATB) gameplay (like the random battles in FF6/Chrono Trigger which would take ten seconds to resolve, not the ones in FF9 which take three minutes);
• ability to customise your party through gear, skill choices, a 'job' system or similar;
• some element of dungeon-crawling/exploration/resource-management;
• not too 'animu' - I can do charming, cartoony visuals, but can't handle 12 year-olds in maid outfits or the art direction in stuff like the Tales or Atelier series;
• I'm an old man, so would prefer something whose style isn't too adolescent or 'edgy'.

I have access to a Switch, PS4, PC (and various emulators) - if something's old-school but underplayed feel free to recommend it and I'm sure I'll be able to track it down. Thanks for your help!