Do the Astros have the best rotation in baseball?

After the addition of Gerrit Cole, MLB Tonight asks if the Astros have the best pitching rotation in baseball. Nothing is final yet, but the Astros will likely set their rotation with Justin Verlander, Dallas Keuchel, Gerrit Cole, Charlie Morton, and Lance McCullers. Brad Peacock will probably end up moving to the bullpen, but can be inserted into the starting rotation if needed.