I will only suggest ones I haven’t seen anyone else mentioning.

Juche Gang

• As the name suggests, you will find a lot of Kim Il Sung and Kim Jong Il works, but also Lenin and particularly Stalin plus commentary on current events and anarchism, social democracy etc.

Comrade Virgo

• More Marxist classics plus some queer theory.

I Mix What I Like

• A Black ML academic (retired at this point, I think)

Historic_ly

• Esha is an ML and a historian currently living in Russia where she’s writing her thesis. Focuses on history of WWII and Russia. She’s also a recurring guest on Iranian media like presstv.