You need to be more descriptive at what you mean. Grind is opinionative meaning what someone considers grindy is not the same as someone else. Do you mean you want more quest, less quests, other options to earn exp like battlegrounds and crafting, what?
There are a few games with crazy amounts of loot and customization but some of those options don't effect you in game like PSO2, you get tons of items and can customize a lot but most of it is just for looks.
Sounds like you want a hub based MMO like Diablo 3, Vindictus or PSO2. They are pretty much nothing but dungeon runs for normal questing but they can feel grindy.
diablo 3. to everyone that's been *****ing about the game. it actually has improved a lot, and monk's have been buffed as well. They are getting a even better buff at 2.3 (I don't know if it came out yet) with the introduction of ladders and whatnot. Game is really heavily loot based, and loot system has been buffed from kadala and rifts. I haven't played quite some time though cause I fcked up with my authenticator when I reset my phone playing brave frontier, but the game is a fast level hella loot game.