You can reset on console too, if you don't mind momentarily having only one save file. Enter the save function and delete all saves including any autosaves. Then back all the way out of the menu (I mean all the way out to the game, not just the save menu). Now go back to the save menu and save. It will now be number 1. I suppose you could have a system freeze while saving, which would svck, but I've only ever had that with autosaves (and have disabled them as a result).
Obviously, you can't do this if you have more than one character, but you can keep your numbering pretty low if you keep only one permanent save per character.