The Capablanca Club

It is well known that Capa lost the least number of games (and the smallest percentage of games played) of any grandmaster, with only 35* losses (23 with Black and 12 with White) over the course of a professional career spanning 30 years and approximately 700 official games. The list of players who defeated Capablanca as an adult (not counting his numerous simultaneous exhibits, of course) numbers 26 . . .

Seven wins
Alexander Alekhine - 1927 Match Games #1,11,12,21,32,34 and AVRO 1938

Two wins
Frank Marshall - 1909 Match Game #7 and Habana 1913
Emmanuel Lasker - Saint Petersburg 1914 and Moscow 1935
Richard Spielmann - Bad Kissingen 1928 and Carlsbad 1929

One win
Roy Black - New York 1911
Akiba Rubenstein - San Sebastian 1911
Charles Jaffe - New York 1913 (**)
David Janowsky - Habana 1913
Arnold Aurbach - 1913 Match Game #1
Eugene Znosko-Borovsky - 1913 Match Game #2
Siegbert Tarrasch - Saint Petersburg 1914
Oscar Chajes - New York 1916
Richard Reti - New York 1924
Alexander Ilyin-Zhenevsky - Moscow 1925
Boris Verlinsky - Moscow 1925
Friedrich Saemisch - Carlsbad 1929
Mir Sultan-Khan - Hasting 1930
George Thomas - Hastings 1934
Andre Lilienthal - Hastings 1934
Nikolai Riumin - Moscow 1935
Samuel Reshevsky - Margate 1935
Salo Flohr - Nottingham 1936
Erich Eliskases - Semmering Baden 1937
Paul Keres - AVRO 1938 (***)
Mikhail Botvinnik - AVRO 1938
Max Euwe - AVRO 1938

(*) The number is often given as 34 with Aurbach's 1913 exhibition match win excluded..

(**) Capablanca and Jaffe played a short informal match in New York in 1912. The first game (10/18/1912) was drawn, and Capablanca won game 2 (10/23/1912) and game 3 (11/9/1912). According to one source I found there was a fourth game that Jaffe won, but I have not been able to obtain a game score or even confirmation of this game's existence.
(***) Keres is the only player with a plus score against Capablanca over more than one game, +1 -0 =5.