I made this special massive 36 room modular dungeon set specially for Fantasy Grounds (and other RPG) users, and specially to equip new DM's with a decent set of free maps ready-to-go, a while back - it's already packaged into a FG module with rollable tables for random rooms, visual map selection panel and all that good stuff you can expect from GTW products -and it's totally free. Or you can download the tiles themselves. They're 16x16" and lovingly decorated with a huge variety of rooms, features, corridors and passageways.

https://www.gametilewarehouse2020.com/free-for-fg

Dungeon Room Selection Panel.jpg