Would Lara pose more of a threat to GGG then anybody else he fought?

Exactly, good head movement, zero body defence. GGG pulverises his internal organs into a gelatinous mess of matter with 4 rounds.

 

Perhaps. Though it doesn't really matter as he still gets laid out by Golovkin, then people on this forum will say Golovkin was always going to KO him because Lara is a natural 154'er and Golovkin should stop picking on smaller men and fight Ward at 175, as jumping up two weight classes is the only viable way of measuring how good Golovkin is, of course.