James Gunn started at Troma, which is visible in his tolerance for bad taste, and his films are consistently about broken people who become a family without anyone using the word. The Guardians of the Galaxy trilogy is built on that and earns its ending across three films.
The soundtracks are structural instead of decorative. Guardians opens on a boy with a cassette from his dead mother, and every needle drop afterward carries that.
He was fired by Disney over old social media posts, hired by Warner for The Suicide Squad, rehired by Disney, and now runs DC Studios. The films themselves have been unusually consistent through all of it.