Thank you all for the suggestions. Some great games for me to try and a couple I already have that I haven't played yet! Added a list to the original post.
Just to add one of the reasons I like FTL is that by the end of a run I'm normally a nervous wreck/exhausted and don't want to play again so my terrible discipline isn't a factor.
Also for anyone else looking for some of that FTL feel I really enjoyed Dungeon of the Endless.