Who might find it difficult to get a chunk of him, because Gabriel would be fairly opposed to the whole idea. He likes Reaper, but he likes being whole more.
In Reaper's earlier days, Gabriel flirted with her and still might on occasion, but he'd not be serious about it. Particularly since Who has expressed an interest.
Yeah, Shiva was a lot easier, but given his aquatic powers, Chthulhu was too good to resist!