Sorry, but every one of these unmentioned Americans was a stone-cold killer in that same era:
Dallas West, Lou Butera, Danny DiLiberto, Ray Martin, Pete Margo, Pat McGown, Larry Lisciotti, Dick Lane, Tom Jennings, Jack Colavita, Mike Lebron, Mike Zuglan, Grady Matthews, Jon Ervolino, Jim Fusco, Toby Sweet, Wade Crane and Richie Florence.
The American talent pool was very deep in those years.
You saw them play live, sjm. I didn't. I can only judge based on the limited amount of video available online. As such my perceptions are far more limited, though you could also be cursed with a perspective laced with nostalgia and a (justifiable) reverence for the past.
You are, of course, correct that the talent pool was deeper than ever "in those years." Certainly compared to now.
I still think the top 10 U.S. players in this era could compete with the top 10 players of the 1990s, though I would give a clear edge to the older generation. There is no quartet now to match Sigel, Strickland, Varner and Archer, among one group of four you could pick from back then.
It's not contest if we are talking top 20 or 30 then vs now. The U.S. talent pool these days has plenty of 600 to 750 players, but very few true masters of the game.
But was U.S. pool deep? In terms of what? Very subjective to me. Hard to judge by titles of a bygone era when there were lots of tourneys of varying qualities, many of which no longer exist.
I defer to you on this, though. Clearly there has been no other era in the U.S. with that number of great or high-level players.
Having watched hundreds of hours of old vids, I've concluded that today's players are generally technically better. They are better at breaking, safety play and perhaps even kicking - though there seemed to be no ball Grady Matthews couldn't find a way to touch.
The older players were savvier and mentally tougher, it seems. They kept the game even simpler and made, imo, fewer inexplicable decisions. At times, though, some of them seemed a bit sloppy compared to modern players, who seem to agonize over everything. and study the table to death.
Whatever the case, we would all love to see more great American players. I have some hope - there's never been a better time to learn the game with all the info available publicly.