Jacobs is an elite win. If it counts for Canelo it certainly counts for GGG who beat him first and 2 years earlier.
Canelo being "smaller" lol, just because you cut massive weight to avoid a division doesn't mean you're smaller. No one is calling Tank Davis the smaller fighter of anyone he faces against at 135.
He actually did call out Andre Ward and the two had a meeting with HBO about it but Ward made up some excuse during his inactivity to not have the bout. And the Kovalev thing, not sure where they stood seeing as they sparred a lot together.
And despite not fighting him, you may as well put a prime Sergio Martinez on GGG's record because they've been on record saying they wanted no part of him and blatantly ducked him for years, even though neither were big money fighters at the time.