From Rob Lifson's write up of the Tango near set (16/18)
"If the family's 1995 statement documenting the quantities of each card in the find is accurate, this written declaration defines exactly what players exist and how many of each exist of the lowest population cards. The letter does not list Honus Wagner or Joe Tinker, though Wagner and Tinker are listed on all Tango Eggs checklists. There is also no second pose of Cobb according to this letter, though some collectors have reported that this card also exists. No additional examples of Morgan and Felsch have been confirmed to exist, though legend has it that three examples exist of each. Based on the letter from the family, only one example each of Morgan and Felsch exists and they are here, included in this collection. Is it possible that Tango Eggs cards of Wagner and Tinker and others that appear to many to be rumours - the baseball card equivalent of an "urban myth" - actually exist but are for some reason are impossible to verify in any way? Absolutely! Anything is possible. REA is in no way intending to be disrespectful or questioning the sincerity of some of the hobby's most highly respected card historians who believe that cards of Wagner, Tinker, and the others in question do, in fact, exist. We acknowledge that this is a possibility, but think this is less likely than collectors remembering cards in error, or repeating mistaken accounts of the existence of cards that do not exist. We are hereby offering a $100,000 reward - yes, a reward! - if the Tinker, Wagner, and the two additional examples of Morgan and Felsch (six cards in total) can be produced for our inspection prior to the close of this auction, and are graded by PSA for authenticity (we will pay for grading as well)."
There are at least 2 Morgans- the one in the REA auction, and another that Lew Lipset sold on ebay a few years ago.
In addition to these, there is a Rebel Oakes that is uncataloged- it would seem to be pre- find, backing up Frank Ward's info about Tango's existing back in the '70's/80's.
BcD did say he's got the Cobb, and that there were 2 different poses. That would put the number in the set at either 19, 21, or 22.
From my experience Bresnahan and Crawford are no tougher or easier than Bridwell and Zimmerman.
Very easy- Bescher and Jennings
A bit tougher, but not relatively scarce- Collins, Chase, Weaver, Dooin, McQuillan, Meyers, Murphy
Very tough- Bresnahan, Crawford, Bridwell, Zimmerman,Morgan
Incredibly difficult- Felsch, Cobb, Cobb2*, Evers, Schaeffer, Oakes, Tinker*, Wagner*
*if they even exist
REA near set listing
http://www.robertedwardauctions.com/.../2007/358.html
edited to make Rob's quote clearly a quote