Yeah, IMO Legerdemain, Diablo, Spelunky, and Dwarf Fortress (fortress mode) are mixes of Roguelike and some other genre, not true roguelikes. I think that's a compromise that we should all agree on.
You could also call that roguelike-likes or semi-roguelikes (which would also include Desktop Dungeons, Decker, and Triangle Wizard, which I have not included in the previous list because I see no second genre mixed in, but still they are not roguelikes, as the tactics are completely different).