Not in order:
Jerry Lawler
Ric Flair
Ricky Steamboat
Ricky Morton
Terry Funk
Stan Hansen
Jumbo Tsuruta
Dick Murdoch
Barry Windham
Sgt Slaughter
Purely off of in ring work, match calibre and their performances. Would not argue against Hogan, Savage,Andre, Piper, Dusty etc being included and Arn, Tully, Bill Dundee, Dutch Mantell, Backlund, Butch Reed,Bobby Eaton, Jim Duggan, Ted Dibiase, Dick Slater etc all just narrowly miss out. Slaughter's matches vs Backlund, Patterson and the infamous Boot Camp match vs Iron Sheik demonstrate his tremendous in ring ability, and his tag with Kernodle v Steamboat & Youngblood in 1983 is a contender for greatest US Tag Match of all time.
Ricky Morton to me is the closest thing to Ricky Steamboat as the textbook babyface/face in peril, just watch any number of his tags throughout the decade against the Midnight Express as well as his singles run in 1986 against Ric Flair in the Cage at the Great American Bash to see evidence of his talent.
Dick Murdoch to me is one of the most naturally gifted and talented pro wrestlers of all time, very much in the Terry Funk class of just understanding the little touches that make a match so great and a truly gifted performer in any environment. The infamous Windham match from 87 or his Mid South epic v Butch Reed highlight the talent he possessed.
As for Stan Hansen, well just watch the Andre match from 81, anyone of his singles/tag matches opposite Terry Funk in All Japan (special mention to the 08/31/83 retirement tag in particular)as well as his matches v Tsuruta and other Japan natives. Truly a brilliant heel and powerhouse brawler and his work opposite Andre in NJPW demonstrates the talent he had as a babyface in engaging the Japanese crowd, something not many foreign wrestlers have managed to emulate througout the history of gaijins in Japan.