Of scopes I have actually used significantly and compared, here is my list starting with what has been the best: a PV 2.5-10x56. There is no such thing as perfection, though I seem to be chasing it and forever swapping scopes. Some have better contrast. Some resolve fine detail better. Some are sharper to the edges. Some are more forgiving with their sweet spots. And some have better reticles. But none seem to have hit on the ultimate combination just yet. And with dumb marketing moves -- like Zeiss ditching its wonderful #4 reticle -- I don't see that ever happening.
Swarovski PV 2.5-10x56
Zeiss Diavari Victory 2.5-10x50
Zeiss Diavari Victory 3-12x56
Meopta MeoStar 3-12x56
Kahles Helia CL 3-10x50
Kahles Helia CL 4-12x52
Zeiss Diavari Victory 2.5-10x42
Meopta Meostar 3-10x50
Zeiss Diavari Victory 1.5-6x42
Kahles Helia C 8x56
Zeiss Conquest DL 3-12x50
Zeiss Classic Diatal 6x42
Meopta MeoStar 4-12x40
Zeiss Diavari V 3-9x42
Swarovski PH 2.5-10x42
There are probably a couple I have forgotten about. My memory isn't what it used to be. Below that list, lots of scopes clutter the candidates and can certainly take you to the edge of darkness, including the Conquest 3.5-10x50 and similar models, the MeoPro series, the AV/Z3/Z5 series, the VX6 and VX3s, upper-end Burris, upper-end Nikon and the Kahles AH among others.
