Science & Fun - Jonathan Graehl

Robin Hanson - generates new ideas at a rapid clip. He’s reckless. I like him that way.

Eliezer Yudkowsky - rhetoric in favor of reason (along with some interesting advocacy against careless AI research, which may one day become relevant). Also, fan fiction.

Katja Grace - apparently a philosophy student. Sometimes brilliant.

Seth Roberts - quirky self-experimentation - e.g. butter makes your brain faster?

(this is not exhaustive)