Not in the same conversation with "guys like" (please name the others

) Simmons huh?
Defensive metrics are, of course, imperfect, but it’s still notable that since debuting in 2010, Heywardleads all Major Leaguers, at any position, with 119 Defensive Runs Saved. He’s also the runaway leader in cumulative Ultimate Zone Rating in that time (+94.4), and his prorated UZR/150 of +18.4 trails only Juan Lagares and Andrelton Simmons among qualified fielders. Those rankings hold weight even when shortening the sample size to the past three years, as each metric agrees that Heyward is the best defensive player in the game aside from his former Atlanta teammate, Simmons.
Guys get paid based on their futures unfortunately, just look at Smardizja, and while good comps none of those players you listed were free agents at 26. Chris Davis had 7/150 in hand, I'm just not seeing why people disagree with market value here. Sure he's not quite a 23M player but look at his competition this year