This app was mentioned in 23 comments, with an average of 1.13 upvotes
Squad of 4, turn based - Arcane Quest 3
Roguelike with lots of flavor - Buriedbornes
First person open world turn based - The Quest
Hack and slash quest driven with controller support - The Dark Book
There are, you just have to peel back a layer or two to get past the the flashy garbage.
Honestly for Multiplayer the RPG genre is lacking. But there are some good ones out there.
Acane Quest 3 is a really solid tactical squad dungeon crawl RPG with nice graphics and multi platform (android, ios, windows). It has as campaign, user created dungeons, and online co op with a friend. There may be others too.
For singleplayer RPGs there are some great games especially in the more retro style. Exiled Kingdoms is one such game.
For pure mulitiplayer fun the best thing for me are MOBA games - Heroes Evolved and Vainglory are the best IMO.