I copied the sceanario database for CMBB as of today into Excel and filtered all the scenarios with 20+ plays and a win percentage of 41-59%.
CMBB - Played alot and pretty balanced
Name -- %uneven -- favored side
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Marxdorf -- 0 -- n/a
Korsun Relief -- 0 -- n/a
A Morning at the Zoo -- 1 -- Axis
B&T Early Wittmann -- 1 -- Axis
B&T Clash of the Titans II -- 1 -- Allies
SP Our Backs to the Volga -- 2 -- Gemany
SS Strikes, Kalinin Front -- 2 -- SS
B&T Beginning of the End (Operation) -- 3 -- Allies
Manstein Cometh -- 4 -- USSR
A Second Chance -- 4 -- Allies
Jaegermeister -- 5 -- Germany
B&T Sword of Bagration -- 5 -- Germany
B&T Izyium Diet Plan -- 8 -- USSR
Borisovka Station -- 8 -- Allies
B&T Punch-CounterPunch -- 8 -- Russia
Road to Moscow -- 9 -- Russia
Hornet's Nest -- 9 -- Axis