And then create your own, explaining how. Yes, I'm shamelessly copying the POTUS thread...
Mackenzie King: 1945-48
Lester Pearson: 1948-57
John Diefenbaker: 1957-63
Lester Pearson: 1963-69
Robert Winters: 1969-76
Joe Clark: 1976-80
John Turner: 1980-86
Brian Mulroney: 1986-1995
Jean Chretien: 1995-2003
Paul Martin: 2003-2007
Stephen Harper: 2007-2020 (I wish)
Pearson was King's first choice as successor in OTL. King initially wanted to run in 1949 for a seventh term at the age of 74 in order to welcome Newfoundland, but the party dug in and he retired.
Diefenbaker: Same as OTL.
Pearson hangs on until 1963, wins a majority in 1966 and hands over to Winters in 1969- he finished second to Trudeau in '68 in OTL and disappeared from memory.
Joe Clark: Same as OTL
John Turner: Wins leadership after Winters' retirement in 1977.
Brian Mulroney: Wins in 1985 convention, enacts FTA in '88. Wins minority in 1993 and defeated by Chretien, who won in 1990.
Martin: As per OTL, except surrenders to Layton's blackmail in '05.
Harper: Wins in '07 as PC Leader, wins majority in 2009.