Not sure Boyd is the answer, but I read that he left Tennessee without a contract.
It seems like Boyd is asking for more in terms of contract value than he can produce on the field. Outside of Boyd, here's a few of the top remaining options:
Michael Thomas - He was a monster early in his career but injuries have slowed him down and with three straight years with mediocre production, the odds of him being a good option are low.
Hunter Renfrow - He may get a bit too much credit for his one 1,000 yard season. Seems redundant after drafting Roman Wilson.
Zay Jones - He's a guy. I'm not sure how much he offers with only 3 seasons with 40+ receptions in 8 years in the NFL.
Mecole Hardman - Had a very defined role for the Chiefs and did nothing once he landed in New York. Even in KC wasn't overly productive. Probably not my favorite option here.
Marquez Valdes-Scantling - Not a volume producer, instead a big-play threat averaging 17.0 YPC for his career. With Wilson and the deep ball back in play, MVS and Pickens could be a good duo with Wilson and Freiermuth working the middle of the field. His hands though...
Corey Davis - Davis retired and just announced a comeback. Similar big play threat to MVS, do you want a guy who stepped away from the game last year?