Had Jeannette Been Champion Would he Have Defended Against Johnson?

I'll put my hand up and say(not admit) that I'm a Johnson fan, I like his balls. I think from around 1905-1910 he was in his era invincible, as dominating as any champion ever, Sullivan his only competitor.
He had easily defeated the best fighters white and black and hadn't truly a decent contest after the Hart fight. He was a relative slow beginner, learning on the hoof and needing a bit of bulk for his effective spoiling, man-handling style to go with his speed, reflexes, ring intelligence and power. He might have suffered in later eras where the average contender was bigger, and stronger but in that time frame nobody had that mix of skill and strength.
All this the regular posters know while there are no facts only opinions, I don't give anyone much chance of winning as much as a few rounds off Jack in that time frame. Personally I don't think it's given that McVey or Jeannette beats Burns, circa 1906-10. Sam I would be fairly confident of.
The point of this rambling text is that we really don't know, or ever will know, how good the Johnson of 1911-15 was or could be, well I suppose we know he was fairly good, able to cope with the Moran's of the world but Moran was pretty average. His Moran and Jim Johnson performances would not beat title challenging and conditioned Langford, McVey or Jeannette. The question is could he step up to his 1910 level? If he could he'd beat all three handily IMO.
The losing display against Willard suggests that Jack could still step up to the mark but we'll never know, hence these threads.