If Dwarf Fortress can get a fantastic GUI, does that mean we can get one for NetHack too? I can dream.

I would check out Dungeon Crawl: Stone Soup if you like roguelikes. It is similar to Nethack and has both tiles and an ASCII version.

Adding Brogue [1] to the list. Neat and very well balanced.

[1] https://github.com/tmewett/BrogueCE