Played ca. 50 demos and these are the ones I actually liked.

>Good
Blood thief - Similar to Neon White but with a thief-like aesthetic
Metal Eden - Very polished doom 2016-esque shooter
Ascend to zero - Good music and interesting premise. The resource-management aspect to builds/ combat is cool too
Jupiter Hell Classic - DoomRL good
House of Necrosis - Surprisingly fun RE dungeon crawler

>Has potential
Era One
Ninja Gaiden Ragebound
Dead as Disco
Phase Zero
Glaciered
Holstin
Turbo Blast
Verho
Dragon March
Wizman's World
Quarantine Zone: The Last Check
Quartet

Pic related may be my final demo.
Any more recommendations left? I'd welcome any recommendation.