I got four recommendations, all great and only one of them on sale lol
MARDEK: Late 2000's flash game classic RPG, updated semi recently. A solid nostalgia trip for those who played it back in the day and overall a great RPG with a deeper than average story and a fantastic engine that makes me wish it was open source
OMORI : Psychological "horror" that's more tragic than scary. One of those games best headed into blind so I will say little but it's the most "objectively" good on the list, in general consensus
GRIFTLANDS: Not really what comes to mind with turn based RPGs but it's a great little deckbuilder rougelite that I've spent an ungodly amount of hours on for what amount of content is in it, complete with some rich characters and decent story and worldbuilding for what it's worth
EPIC BATTLE FANTASY 5: Silly, tongue in cheek, juvenile humor next to one of the most in depth turn based battle games I've ever seen. It's silly veneer and charming graphics hide some real deep turn based combat gameplay, and it's the only game on this list that's actually on sale right now
MARDEK is an absolute Flash classic for certain, but also one that seemed kinda obscure/hard to find on Flash game sites if I remember correctly? Pretty dope.
I also think Epic Battle Fantasy 3 and Epic Battle Fantasy 4 hold up fairly well in the present as well, with EBF 3 being free and EBF 4 also on sale rn. People can also try out EBF 1 and 2 in the Epic Battle Fantasy Collection, but those are rougher in comparison .