If the .270 is great the .30-06 must be off the charts!
I'd have to agree though- with what you're asking "deer from 0-500" it's tough to beat the .270.
Off the top of my head I've shot deer with a .243,
.270, .30-30, .30-40, 7.62x54, .300sav, .30-06, .375 win, .44 mag, .45-70, .50, and 12 ga slugs.
The 12 gauge has been the best, most haven't even taken a step. But there are obvious limitations when using slugs. I was very impressed with the .45-70 and .375 Winchester. The others have all done well!
There's "better" in terms of performance, but they come at a higher recoil and higher loading cost. And you don't need "better" for deer.
When I set my wife up with a rifle, I went with a .270. and I've found myself carrying it several times now.
Most hunters don't need 0-500. Most need 0-75. But for a true all around "do anything deer related" rifle, a .270 is a great choice (and so is the 6.5 Creed, and a whole bunch of other options too.)
-Jake