Yes, Danny and Brad have been great, though I expect better than 2 titles in 20 years (given we've had some bad luck).
But to say they are better than Red Auerbach ? Sorry, No. Red didn't build two contenders. Red built, from scratch, three championship eras.
Of course, he put together the original Celtics 60's dynasty because he was smart enough to understand the value of Bill Russell and then had the ability to get in position to acquire him. After the 60's teams finally ran out, Red built the 70's juggernaut in just two seasons mostly with genius draft picks (Havlicek, Cowens, JoJo and Chaney) and the acquisition of Paul Silas. The late 70's brought John Y. Brown's ego that almost destroyed the franchise followed by possibly Red's greatest rebuild, drafting Larry Bird as a junior eligible and then executing the most lopsided trade in league history that brought McHale and Parrish to Boston. He also drafted Cedric Maxwell and traded for Dennis Johnson, two crucial pieces of the 80's title teams. Red then made yet another genius move to acquire the draft position to take Len Bias along with picking Reggie Lewis to insure the continuation of title contention, only to suffer the most disastrous losses of any franchise in league history that sent us into the 90's tailspin that took years to recover from.