Most big free agents have been signed, and the 2026 NFL Draft is now over, which means most NFL offenses are, for the most part, complete. We have a very good idea of how these offenses will look this upcoming season, and now we have to rank them. These are the five best offenses in all of fantasy football heading into the 2026 season. 5. Detroit Lions The Lions are coming off a down year, but are still loaded with offensive stars. Their weakest fantasy position is their quarterback. While Jared Goff is far from an elite fantasy option, he's good enough in real life that he can sustain fantasy relevance for multiple pass-catchers. However, he does hold them back from ranking even higher. Jahmyr Gibbs is our fantasy RB2 overall and should be even better this season with David Montgomery being traded to the Houston Texans this offseason. However, they also have an intriguing backup running back in Isiah Pacheco, who we expect to serve as more of a true handcuff, rather than part of a committee.…