"He's always been the best man I know," was the unhesitant response.
He's the best man I know, aside from Rhyn.
In response, the best man acknowledges the groom's toast to the bridesmaids and goes on to relate some amusing anecdotes about his relationship to the groom.
Clooney was best man in actor Richard Kind's wedding.
It is not the responsibility of a bridesmaid, matron of honor, groomsman or best man to host an engagement party.