I think you could probably add Foreman vs Wlad as well. I just can't see how he could deal with the relentless pressure, and power punches. I can't see him being able to clinch Foreman the way he's done to his opponents for the last half decade.
I think that the first fight is Byrds. He's as slick as anybody Louis faced (and Louis doesn't have Ike ' s manic workrate or Wlad ' s size) and a southpaws, something Louis never really faced as a champion, a type of fighter Louis admitted he didn't want to fight. Give him 15 rounds, a rematch, and Blackburn to retool him and I think he catches him. The only thing that really worries me is that Byrd is a slip and peck fighter rather than a pure mover and against as accurate and fluid a combination puncher as Louis that could be disastrous. But I think Byrd could win one of three.