KG teamed up with Ray and Paul. He diluted his contribution to the cause by doing so. Lebron did the same thing in Miami, or so we thought, but he still pulled a couple MVPs from those seasons when everyone here was saying he would be the Robin to Wade's Batman, and that Lebron's MVP run was over.
If it who's most responsible for the biggest change in fortune (positive) for a franchise then it would be Lebron every year. KD got his because RW went down and he was able to absorb Russell's spotlight. Nash did the same thing in Phoenix a couple years when he'd go out for an injury and the team would start losing. He'd return and they'd pick right back up where they left off. He appeared to be the difference maker.
If Curry goes down and the team doesn't falter, which is what Curry would want, then that would be detrimental to Curry's MVP run. Would the Warriors be more ed without Curry than the Cavs would be without Lebron?