Hello Niggles!
Sorry for the semantics, but are you looking explicitely for the so-called "roguelites" or as well for "roguelikes"?
For the latter, I like to take a look at
roguebasin or the entries in the yearly 7-Day-Roguelike-Challenges.
For something more "roguelite", I can recommend Terry Cavanagh's "Tiny Heist". It mixes line-of-sight based stealth with some roguelike elements. Where the objective is to get through each floor, collecting keys and bypassing guards, security cameras and other obstacles. Each run can be quite short. And I have not been able, yet, to get past the nineth floor.
Oh, and it is free on itch.io!
Tiny Heist on itch.io Kind regards,
foxgog