Roger Walkowiak had three wins. The Tour in '56, & stage wins in the Vuelta in (may) '56 & 57.
Every win also from a breakaway...
PCS don't have the stage results from the 1952 Tour de l'Ouest, and he seems to have won one of them as well.

1952 Tour de l'Ouest
The 6th Stage of 1952 Tour de l'Ouest was won by Roger Walkowiak.

Rik Van Looy
First Cycling and Wikipedia both list the 1970 Kessel-Lier as having been Van Looy's last victory, rather than the Heistse Pijl the previous year;
