Even if assume that Tatsumaki >= Geryuganshoop based on Tatsumaki has better chance than Boros's commanders to defeat Orochi, and if we ignore that Geryuganshoop is even better than Tatsumaki at one area of psychic ability, which is a great feat even for a Dragon level monster, imagine Bakuzan or Hellfire is being better than Gouketsu or Flashy Flash at one area of fighting, it would be a great feat for them.
God level Boros's level is still too high for anyone here.
We know even Dragon level beings can one-shot each other when there is a gap between them, even when they are all in the same Dragon level.
-Flashy Flash is Dragon level, he dealt with 2 Dragon level speedsters Hellfire and Gale Wind at the same time.
-Fullpower Bang is Dragon level, yet he one-shotted 2 Dragon level opponents; Fuhrer Ugly and Gums.
-Dragon level Gouketsu could one-shot or low-diff Dragon level Bakuzan.
There are levels inside of Dragon level as well.
There are only two God level fighters; Prime Garou and Boros based on ONE's statement about how close Boros v Prime Garou would be, and Garou saying that he is God level, not Dragon.
ONE: ''Before, Boros was definitely the stronger one, but Garou is now a near-perfect monster. I don't really know. A good match... I do believe Garou is stronger in close combat where things like punches and kicks can generally be avoided.''
Boros would one-shot anyone in here since the gap is too much, bigger than the gap between a Dragon level being with another Dragon level being.
We also have Geryuganshoop + other commanders alone have ''minimal'' chance to defeat Orochi, who is the strongest monster of the association. If that minimal chance doesn't happen, it's fine, they can still give high-difficulty to Orochi before losing, and that's even without Boros doing anything.
I doubt any monster except for Prime Garou can even break Boros's armor, it needed Saitama's normal punch to break it, and a single normal punch defeated Orochi, strongest monster in the association. Boros can potentially beat any monster here with low-mid diff without even unleashing his full power, if they somehow break Boros's armor and unleash Boros's fullpower, Boros would start to one-shot them one by one due to the big power gap between him and the others. He is too fast, too strong, he has extremely powerful energy blasts from long range.
So, yup
Boros solos this.