I believe Osward did the physical shooting completely alone, and most likely the whole thing. But if there was anyone else involved, LBJ was certainly about the only one that makes sense.
I’ve read a lot of evidence contrary to the lone shooter, so much that it seems that it would have been impossible for Oswald to do it alone. Looks like you haven’t.
I doubt that and more importantly Senator Richard Russell did not think so. He was on the Warren Commission but did buy the conclusions and wrote a 33 page rebuttal of the findings.