I never found the magic parts to be the least interesting in GoT - the prophecy stuff, the white walkers, the dragons… I always felt that distracted from the battles and the scheming.

Is there any film, show or book that focuses on something like the Wars of the Roses, without all the magic BS?

The only documentary I’ve seen on the topic is ‘The Real White Queen and Her Rivals’ by BBC.

Looks like the big battle between the Starks (Tudor/Lancaster) and the Boltons (York) this season will be based on the Battle of Bosworth Field, with Littlefinger being the Stanley family.