Yes and no. Great, good, better best - they are very subjective ideas depending on so many things, including the one who is talking. If that is your opinion, I respect that. Others will have something different for sure. Never the less it's a nice idea.The 30-06 is a great caliber. The 338 WinMag is better. True all around. Period.
However, a similar equation can be written:
The 30-06 is a great caliber. The 300 mag (PRC/Wby/WM/WSM ) is better. True all around. Period.
So that the 300 Mag(s) and the 338 Win Mag
are left to fight out, on a .535" bolt-face, the same battle as
. . . the 270 vs. 30-06 on the .473" bolt-face. And then people might even decide to split the difference and carry a superlight 308Win.