Here are my ten...
1) Redgrave's five Olympic golds
2) A dodgy linesman ensuring England win the Football World Cup
3) Lennox's heavyweight title reign
4) Botham's Ashes heroics
5) England kick their way to the Rugby World Cup
6) Notts Forest winning and retaining the European Cup
7) Liverpool win the European Cup from three goals down
8) Wiggins wins Tour de France
9) Bannister's 4-minute mile
10) Ellen McArthur sitting in a boat for twelve months
Look forward the thread not becoming a tedious debate about achievements in solo sports being more credible than in team sports.