I don't think neither, nor I are really qualified to judge independently who has the most influence because we are simply not experts. What we have though is the wider view in the football coaching community and there is no reason really to doubt the testimony of countless managers and how they talk about Pep and what he brought to the game. Tuchel for once is self confessed Pep acolyte.
This, and Klopp or Bielsa's influence are not mutually exclusive. I would say that over the past twenty or thirty years, the figures usually cited in terms of tactical influence are Sacchi, Cruyff, Bielsa and Pep. At the end of the day everything is derivative of something else and if you dig deep enough, you will find that no one is original but if we put it in terms of who is the most tactically studied figures in modern coaching, I don't think I am missing many names.