You're like a 12 year old girl fawning over Justin Beiber.
There's actually some adults and some boys who dig his music, however anyone wants to take that.
They're really close to Springsteen, but trust me when I say that they get edged out by the slimmest of margins and leave it at that.
I would venture to say that Bruce Springsteen has a wider demographics base as a live performer and a recording artist; his music is essentially updated "straight rock and roll," not really fitting into special markets (hard rock, soul, hip-hop, etc.).
On James Brown, he was one of the favorite live performers of the British Invasion alone (including by acts such as The Rolling Stones and The Who) and won the praise of Elvis Presley and The Beatles. To top that off, his performance impacted Michael Jackson to Prince to so many hip-hop and R&B acts of the ensuing decades, the reigning genres of the world as we speak. He has a wide demographic influence and impact that way.
Again, this is only touching on a variety of demographics.
The one to make the argument to raise the Who's position on any list can't be the one who probably would clean Pete Townshend's toilet bowl with his tongue. Just talk about someone else... PLEASE!
I think it depends more on the person, but that's not to say it can't be a problem.