Okay, so far we have:
Model 10, Liberator, Red Ryder, Pre 64 M70, Garand M1...
You are joking about the Liberator and the Garand, right? Guns that blow up in users' hands, and guns that take off thumbs should not qualify. "First, do no harm" should be used in more places than just the Hippocratic oath, in my opinion!
And if maiming doesn't disqualify the Garand, then how about weighing two to three pounds more than necessary, and becoming in/op if you put a standard .30-06 'round down the tube? And how about that neat "Spoing! I'm out of ammo and you come out from your cover" feature it has built in? Not so bad when facing down a mule deer in Wyoming in the winter, but dang inconvenient when facing the SS in the Ardennes...
OK, this isn't a personal favorite of mine, but lot's of folks love them and I have nothing harsh to say about it - the BHP. Somebody must have mentioned that already, right?
I'd say the current contenders are: S&W Military & Police (aka, Model 10), Winchester M70, Red Ryder, and the Winchester 94 and similar .30-30 lever guns.