My nominations for 1927 are:
Ted “Kid” Lewis (Boxing) – One of Britain’s greatest ever boxers. He won the British and European featherweight titles before he was 19 and then went to the USA. He won the world title from Jack Britton, against whom he fought twenty times, in 1915 and held it until 1919 when Britton won it back. In 1920 he won the British, Empire and European welterweight titles, holding the Empire title until 1924. He won 215 of his 283 contests with another 24 draws.
Eric Liddell (Athletics) – the Olympic 400m champion of 1924, a feat made famous in the film Chariots of Fire. He ran the 400m as the 100m took place on a Sunday when he wouldn’t compete on religious grounds. His winning time in the 400m was an Olympic record and European record that would last for 12 years as the British best. His best 100 yard time remained the British record for 35 years. He was Scottish champion many times and played for Scotland at rugby union seven times.
Henry Taylor (Swimming) – winner of eight Olympic medals, if you include the 1906 intercalated Games. His three gold medals in one Games remained a record for a Briton at any sport for a century. In 1906 he won gold in the one mile freestyle and two more medals, In 1908 he won the 400m and 1500m freestyle titles in world record times and added a third gold in the 4×200 m relay. In 1912 he won two more medals. His world 880 yards freestyle record in 1906 remained unbeaten until 1920. He was still winning national titles until 1920 and competed for England at water polo
Max Woosnam (Tennis) – one of the great all-rounders in British sporting history. He won a Wimbledon doubles title in 1921 and the Olympic gold in the mens doubles in 1920. In singles he reached the Wimbledon quartre-finals. He represented England at football, captaining them once in an Amateur international. He also won a Cambridge University Blue at golf and real tennis, scored a century at Lord’s cricket ground and made a maximum 147 break at snooker.