The Blue Jays are the #1 team in the MLB on the recently updated Baseball Prospectus Hit List.
http://www.baseballprospectus.com/hitlist/
Unlike many power rankings, the Prospectus Hit List rankings are determined objectively via the Hit List Factor, an average of a team's actual winning percentage and the three Pythagenpat winning percentages from our Adjusted Standings report. The first-order winning percentage is calculated via actual runs scored and runs allowed, the second-order winning percentage uses Equivalent Runs scored and allowed, which are calculated from run components (hits, walks, total bases, stolen bases, outs, etc.) and adjusted for park and league scoring levels, and the third-order winning percentage uses Adjusted Equivalent Runs scored and allowed, which adjust the Equivalent Runs totals for the quality of each team's opponents' pitching and defense.
You can find out more about how they determine Hit List ranks here: https://www.baseballprospectus.com/article.php?articleid=4383