My favorites in no particular order:
Garand, Red River Army Depot (6-65) rebuild. Only about a 3 MOA rifle, but very fun to shoot.
NRA Sporter clone, I made myself. A reliable 10 shot 1.25 MOA rifle with either case or those dreadful little yellow thingies.
Remington 4 groove 03A3, rebuilt by Ogden Arsenal and come to me unfired. A reliable 10 shot 1.75 MOA rifle.
1952 Winchester 70, a reliable 10 shot 1.75 MOA rifle.
Winchester 1917, I had not shot it enough to come to any conclusions about it full accuracy.
When I say "reliable 10 shot", I means that is what it will do anyday, when I am doing my part. I have shot many targets smaller, but any targer larger will be my fault.
Without a doubt the 30-06 is my favorite centerfire caliber. I also like the .308 Win., 30-30, 30-40 Krag and 45-70, but the good old "06" leads the pack.