Upload & Sell: Off
35L is superb but also you should consider 24L ii.
The 24L and the 35L are certainly fine lenses, but... as the only lens on a 5D2 either would be a very unusual choice and would not likely come close to meeting the rather large range of needs that the OP described.
OP wrote: "portrait, landscape, stills. the zoom does me good when i do events but prefer the sharpness of prime"
In terms of the needs of the OP, a good zoom would almost certainly make more sense for the subjects he mentions. It is hard to imagine how either of the likely zoom choices (24-70 f/2.8 or 24-105 f/4 IS) would fail to be sharp enough. I shoot the 24-105 and regularly make quite large prints from images it produces on a full frame camera. If the OP isn't getting sharp enough images from such lenses, he probably won't get that level of sharpness from the primes either - the issue is more likely shooting technique or post-processing workflow.
(And, as I was typing, the previous poster suggested the 24-105 plus the 35mm f/2 and the 50mm f/1.4. I use all there of these lenses, and this combination is optically excellent, very flexible, and not as costly.)