Well I'd probably put AO8 ahead on mine but there's a very strong argument for Toews since he's the best matchup center in the NHL (with the only debate being with Bergeron but Toews pulled through in the 2013 finals so I give him the edge)
I would definitely be interested in that debate. Digging up stats (I think I already did this, actually)...
Over the last 4 seasons, Chicago has a 52.6 CF% without Toews on the ice. Boston has a 50.5 CF% without Bergeron on the ice, so you can get a sense of how much help they're getting in this regard from their surrounding talent. Bergeron has a 44.8 ZSO%, Toews has a 60.3 ZSO%.
Toews' top 100 match-ups against other centers over the last 4 seasons (by TOI)
70+ CF%: 4/100
60-69.9 CF%: 28/100
50.1-59.9 CF%: 45/100
50 CF%: 4/100
< 50 CF%: 19/100 (lowest = 34.1 CF%; 2nd lowest = 35.6 CF%)
Toews' game-by-game breakdown by CF% since the start of 2011/12 (263 GP)
80+ CF%: 7/263 (2.7%)
70-79.9 CF%: 28/263 (10.6%)
60-69.9 CF%: 84/263 (31.9%)
50.1-59.9 CF%: 68/263 (25.9%)
50 CF%: 13/263 (4.9%)
40-49.9 CF%: 44/263 (16.7%)
30-39.9 CF%: 14/263 (5.3%)
< 30 CF%: 5/263 (1.9%)
74.8% over 50 CF% vs. 25.2% under 50 CF% (ignoring 50 CF% games).
Bergeron's top 100 match-ups against other centers over the last 4 seasons (by TOI)
70+ CF%: 9/100
60-69.9 CF%: 37/100
50.1-59.9 CF%: 47/100
< 50 CF%: 7/100 (lowest = 42 CF%; 2nd lowest = 46.2 CF%)
Bergeron's game-by-game breakdown by CF% since the start of 2011/12 (284 GP)
80+ CF%: 10/284 (3.5%)
70-79.9 CF%: 53/284 (18.7%)
60-69.9 CF%: 84/284 (29.6%)
50.1-59.9 CF%: 64/284 (22.5%)
50 CF%: 22/284 (7.7%)
40-49.9 CF%: 35/284 (12.3%)
30-39.9 CF%: 15/284 (5.3%)
< 30 CF%: 1/284 (0.4%)*
*As a side note, Bergeron was injured in this game and only played 4 minutes, affecting his numbers. His opponents were 3-1 for Corsi when he was on the ice.
80.5% over 50 CF% vs. 19.5% under 50 CF% (ignoring 50 CF% games).