Eric Wastl who makes Advent of Code also made the Synacor Challenge (https://challenge.synacor.com/) a bunch of years ago which is similar to the Intcode AOC problems and a lot of fun.
I don't follow AoC but I think Eric Wastl is awesome because he used to transcribe anime music (or someone with the same name). (E.g., search for 'eric wastl haibane renmei')