I don't have much first hand knowldge on the East Side of the state, only two teams I've seen in person this year are Booker T and East Central (tournament of champions).
In 6A based on what I've read Union is playing really well together even though they are young. Muskogee is going to have to win two this weekend to advance if I remember correctly but they're dangerous as their guard Wilson can go off for 30+ vs anybody.
In 5A Washington is still the favorite for me, especially if the Nino Jackson ineligible stories are true. Tulsa Central with Reevey Noron could make a run too.
In 4A its Douglass and everyone else. If someone pulls off the upset it would be amazing but I don't see it.