for all the Vinland Saga-heads out there, I'd recommend The Bugle Call: Song of War. First chapter is among the best opening chapters I've read of any manga so far, especially among action/war mangas, and I've read one comment on MangaDex that likened it to the entire development of the first arc of VS, but more cramped and rushed. I might be a bit biased in my evaluation of it tho, given that I also decided to listen to the Tchaikovsky Manfred symphony while reading it, and listening to the first movement while reading the first chapter was a transcendental experience for me.

Issak is one I found and binged yesterday which I also enjoyed. Classic 'one apprentice seeks revenge on another for killing their master' premise, only its happening in the Holy Roman Empire at the outset of the Thirty Years' War. My only foreknowledge of the Thirty Years' War comes from Matt Christman's Hell on Earth podcast series, but it was still pretty pog when Wallenstein makes his appearance. One of the major charas is a follower of Thomas Müntzer, tho I doubt that connection will be taken as far as it could. CW for gore thruout, and attempted SA in first chapter.

If you don't mind long strip style, then I'd like to plug again Martial Wild West. A wuxia set in Han Dynasty-settled Turtle Island; it gave me a lot of Kenshi vibes. Am waiting for it to come out of hiatus...