This may not be a lot of help, but I find almost every lens I try on my 1D4 (or before that, my 1D3) works quite well ... I use a 17-40 and 24-105 pairing the most, but my Sigma 8-16 works well on it from 12mm or so up, and I just shot a few with a Rokie 8mm fisheye of a church interior. Longer lenses work fine, of course.
The only lens in my cupboard I haven't used on it are the Sigma 30 and the Samyang 24mm TS, and I plan to try out the latter soon.
Like CDS, what I hear about the 7D2 so far is all I know, but I'm finding the results I get with the 1D4 are so close to what I get with my 5D3 that it doesn't seem to matter which one I use (with the exception of fast moving stuff, that's for the 1D4) ...