My WAR calculation is a combination of Baseball-reference and Clay Davenport; I believe it to be the "best" WAR number available for historical comparison. 8 WAR is an MVP quality season. The record is pythagorean adjusted for 162 games.
1935 91-71
C Gus Mancuso
1.8
1B Bill Terry 4.5
2B Mark Koenig 1.45
SS Dick Bartell 3.3
3B Travis Jackson 2.6
LF Jo Jo Moore 3.55
CF Hank Leiber 4.35
RF Mel Ott 8.15 MVPQ
2B Hughie Critz -1.15
2B Al Cuccinello .3
C Harry Danning .25
1B Phil Weintraub -.1
OF Kiddo Davis .4
SP Carl Hubbell 5.25
SP Hal Schumacher 5.1
SP Roy Parmalee 1.25
SP Slick Castleman .5
-Cubs won 21 straight to take the pennant away from the Giants.