[Mick]

The Bryans led the 1997 and 1998 men's tennis teams to national titles.  They also won the 1998 NCAA Doubles title (together).

Ultimately, how you view them goes back to how much you penalize them for being doubles specialists (and I wrote what I wrote thinking of McEnroe specifically).  If you view a title as a title and a Grand Slam as a Grand Slam regardless of whether it was in singles or doubles, then the Bryans accomplished more at Stanford (two national titles, one doubles title) than McEnroe (one national title, one singles title).  Professionally, looking at Grand Slams, McEnroe won 7 singles, 9 doubles, and 1 mixed doubles title.  Mike Bryan won 18 doubles titles and 4 mixed doubles titles, while Bob won 16 doubles titles and 7 mixed doubles titles.  The Bryans have a career grand slam in doubles; McEnroe does not (in singles or doubles).

Of course most people do view accomplishments in singles as a bigger deal than accomplishments in doubles, and I doubt you'd find that many people, myself included, who would rank either of the Bryan twins ahead of McEnroe.

BC

And yet...the Bryans have won more Grand Slam doubles events than any other pair.  McEnroe, great as he was, didn't win the most Grand Slam events, either singles, doubles or mixed doubles.  Nor has McEnroe achieved the Career Super Slam (Australian, French, Wimbledon, U.S. Open, Year End Tournament and Olympic titles) as have the Bryans.

[Mick]

The Bryans led the 1997 and 1998 men's tennis teams to national titles.  They also won the 1998 NCAA Doubles title (together).

Ultimately, how you view them goes back to how much you penalize them for being doubles specialists (and I wrote what I wrote thinking of McEnroe specifically).  If you view a title as a title and a Grand Slam as a Grand Slam regardless of whether it was in singles or doubles, then the Bryans accomplished more at Stanford (two national titles, one doubles title) than McEnroe (one national title, one singles title).  Professionally, looking at Grand Slams, McEnroe won 7 singles, 9 doubles, and 1 mixed doubles title.  Mike Bryan won 18 doubles titles and 4 mixed doubles titles, while Bob won 16 doubles titles and 7 mixed doubles titles.  The Bryans have a career grand slam in doubles; McEnroe does not (in singles or doubles).

Of course most people do view accomplishments in singles as a bigger deal than accomplishments in doubles, and I doubt you'd find that many people, myself included, who would rank either of the Bryan twins ahead of McEnroe.

BC

And yet...the Bryans have won more Grand Slam doubles events than any other pair.  McEnroe, great as he was, didn't win the most Grand Slam events, either singles, doubles or mixed doubles.  Nor has McEnroe achieved the Career Super Slam (Australian, French, Wimbledon, U.S. Open, Year End Tournament and Olympic titles) as have the Bryans.