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 (sort of, there will be a point where Fangraphs is incorporated, but I don't know when that will be) 8 WAR is an MVP quality season. The record is pythagorean adjusted for 162 games.
2019 (71-91)
C Buster Posey 1.4
1B Brandon Belt 1.6
2B Joe Panik .4
SS Brandon Crawford .7
3B Evan Longoria 2.15
LF Mike Yastrzemski 2.65
CF Kevin Pillar 1.6
RF Austin Slater .65
C Stephen Vogt 1.3
2B Donovan Solano 1.8
3B Pablo Sandoval 1.45
OF Alex Dickerson 1.2
SP Madison Bumgarner 2.95
SP Jeff Samardzija 3.35
SP Tyler Beede -.2
SP Dereck Rodriguez -2.15
SP Shaun Anderson -.5
SP Drew Pomeranz -.85
RP Will Smith 3.2
RP Reyes Moronta 1.8
RP Sam Dyson 1.45
-3 of the 11 worst years in SFG history in the past 3 seasons. Things could be better.