There can only be Two.

The Champion to hold the ancient Title he bested all the world's chess masters for.

The Challenger on the same climb to to take the same Title of yore.

Jose Raul Capablanca had the best over-all lifetime score against his fellow World Champions. In fact, Capa achieved the somewhat unique feat of not having a single losing lifetime record in classical games against any fellow World Champion. He also had the least number of games lost to World Champions, 11 out of 99; which means that even when playing against a World Champion, Capa could reasonably be expected to lose only about one game out of ten. By present-day standards Capa started his serious international career quite late, in 1911 at the age of 23. In terms of international experience, the 16 year old Fischer or Kasparov probably had more of it than the 23 year old Capablanca. It truly must have been astonishing for the top masters of his time to witness a newly graduated college student, with no international experience whatsoever plucked from nowhere and plonked down in the middle of a top international tournament, mow down one experienced master after the other. In an era where matches at classical time controls were common because masters often challenged each other for stakes, Capa achieved probably the best match record in all of chess history. In all of his serious chess life, he won around a dozen and a half(!) one-on-one matches, including a massacre of Marshall (+8 -1 =14, 1909) and a whitewash of Kostic (+5 -0 =0, 1919). Capa lost exactly one match, the World Championship Match vs Alekhine which unfortunately for him was the one that cost him his Title (+3 -6 =25, 1927), and tied exactly one, a mini-match vs. Znosko Borovsky (+1 -1 =0, 1913). In other mini-matches in 1913-1914, Capablanca mowed down such strong masters as Alekhine, Mieses, Teichmann, Dus Chotimirsky, Tartakower, and Bernstein; Capa won 10 games, drew two, and lost none, for an incredible score of 11/12. In their only matches against Capablanca, World Champions Lasker and Euwe could not win a single game (Capa winning +4 -0 =10 and +2 -0 =8 respectively). In his 1921 World Championship match with Lasker, Capablanca may have made less errors than any other winner of a WC Match against an opponent who made less errors than any other loser of a WC Match, which if verified would make this match a gold standard for WC matches. Adding to his unbeatable mystique was the fact that Capablanca played incredibly fast, and was regarded by all his colleagues as invincible in rapid and blitz games. The most naturally gifted chessplayer of all time, and deservingly nicknamed "the chess machine" for his quickly played and flowingly impeccable games, the lucidity of his technique probably makes him the most ideal World Champion for beginners to study and has inspired later generations of Champions such as Fischer, Petrosian, Karpov, Kramnik, and Anand, whose styles all bear a similarity to Capa's. Unfortunately, Capablanca was also saddled with inherent laziness and familial hypertension; otherwise, there is little doubt that he could have attained greater heights for a longer period of time. According to computer analysis Capa played the most error-free chess ever in history, probably the closest a human being has ever come to playing like a computer.

Jose Raul Capablanca vs. Emanuel Lasker 6 - 2 (plus 16 draws)

Jose Raul Capablanca vs. Alexander Alekhine 9 - 7 (plus 33 draws)

Jose Raul Capablanca vs. Max Euwe 4 - 1 (plus 13 draws)

Jose Raul Capablanca vs. Mikhail Botvinnik 1 - 1 (plus 5 draws)