You seem to waffle back and forth between Oswald being a patsy and him being a participant in a conspiracy. I guess you're just hedging your bets. Unfortunately, you failed to cover the correct one.
You seem to have a very narrow way of thinking. Why could not Oswald have been both a participant and a patsy?
History gives us a number of examples of men who were involved in conspiracies and who were then made patsies by those conspiracies. It is not uncommon for conspirators to set up one of their fellow plotters, often someone lower down in the chain, as the fall guy, the patsy--for example, the four men framed by Mafia hitman Joseph "The Animal" Barboza for the murder of Ed Deegan in 1965 (Justice Department documents later revealed that FBI agents allowed Barboza to frame the men in order to protect top FBI informants in the Mafia).
For that matter, the Rampart scandal involving the LAPD in the 1990s and early 2000s revealed that some LAPD officers had framed a number of people by planting evidence and committing perjury.
In the real world here on planet Earth, as opposed to the fantasy land embraced by lone-gunman theorists, conspiracies happen, and they sometimes include framing people as patsies/fall guys. That is why there are state and federal laws against conspiracy, and why hundreds of people are convicted of conspiracy each year. That is also why there are many examples of people who were framed as patsies but whose convictions were overturned because evidence of their framing emerged.
Anyway, I notice you said nothing about the evidence of the prolonged, extensive Oswald-Ferrie association. What was an avowed Marxist doing spending so much time with a violent, Mafia-connected right-wing extremist like David Ferrie?