No. 3 Charlie Blackmon
Charlie Blackmon is an all-around player able to cover all outfield positions. At 37 years old, he's concluding his six-year, $113 million contract with Colorado Rockies and is unlikely to come to terms on a new contract due to them rebuilding. Over the course of 71 games this season, he has achieved a .288 batting average, tallying 7 home runs and 32 RBIs. While he hasn't matched his MVP-caliber performance in 2017, where he placed 5th, his potential to offer veteran leadership makes him a good player to sign.
Considering the possibility of signing him to an affordable contract, it could be well worth taking, even if it's just to bring in a veteran. This season, his exceptional plate discipline has been displayed, with 30 walks and 38 strikeouts in 71 games. I would endorse such a signing due to these promising factors.