Famous group picture - Misc. Characters

This is a famous group picture from the Old West. At least following people are noticed from this picture:

Railroad member, Wyatt Earp, Teddy Roosevelt, Doc Holliday, Virgil Earp, Jeremiah Johnson, Butch Cassidy, Sundance Kid,
2 railroad members, Bat Masterson, Judge Roy Bean and Ben Greenough.

I'm not so sure that all those people really are in that pic as it says they are but (different list with both pics)... I cannot prove it wrong... can you? If you can please do email me about it to: frank@franksrealm.com, thanks!

Here is one conclusion about the photo: http://www.ferncanyonpress.com/tombston/wyatt/montana.shtml