Uhm. So, these are bad. The majority of these are sprites that already fit 64 x 64, so you really didn't do anything. Then you have some that are a little bigger than that, but you just decided to cut them off.
And then you have the awful shrinks. Namely N, Hilda, Hilbert, the Ace Trainers, and the Cheerleaders. They're terribly distorted and far too tiny to work as sprites. There's no room for details?