Have you tried Redflagdeals?
They don't chart them but the user base of that site are the ultimate life nits who discuss everything that involves saving a penny and there is always a series of topics on what credit cards have the best reward programs.
MillionDollarJourney.com might also be useful. Not really sure what the concept is but seems like someone blogging about trying to get to a liquid position of $1MM. Regardless, he reviews cards and ranks them.
He has the Capital One Card as the best choice
http://www.milliondollarjourney.com/top-no-fee-rewards-credit-cards-in-canada.htm