Many of the modern anticapitalists and marxists in the western world are aging out. Parenti is currently suffering from Dementia and Wolff is in his eighties and can't go on forever. Who comes next?
Essentially do you see any big modern marxist public figures coming in as the "old guard" ages out? Who?
But in terms of "folks I've been reading that seem to have decent takes:"
Roderic Day of redsails.org has put out some really good pieces in my opinion.
Peter Coffin has a mixture of good takes and bad ones. He's stubborn on holding onto transphobia -- or at least, transphobia-adjacent comments -- and his "LGBTQ+ is a bourgeois ideology" take, which, so far as I can tell, may be one of those "okay, 'technically correct' under your framing of it, but thoroughly counter-productive seeing as literally nobody else frames the issue in this way." Unfortunately, he's recommended stuff from PatSoc Caleb Maupin before too. Basically, I see potential in Coffin, clouded by problems.
What I have read of Xi Jinping -- which isn't much -- has been solid.
So yeah, if you're looking for heroes, I wouldn't hold your breath. But there's life to be found in the world of Marxism.