#2 Should move to SmackDown - The Miz
The Miz was on a hot streak until he got drafted to WWE RAW earlier this year. Shane McMahon beating him at WrestleMania days before the Shake-Up also had something to do with it. The Miz hasn't done a whole lot on RAW and a move back to SmackDown as a heel would be best for him.
The Miz would easily slot into the upper midcard on the blue brand and is someone who can help the younger babyfaces on that brand get over if he returns as a heel.
#2 Should move to RAW - The New Day
If The Revival move to SmackDown in the WWE Draft the best option to replace them on RAW would be The New Day - Kofi Kingston included. Xavier Woods and Big E would bring some much-needed star power to the RAW Tag-Team division.
As for Kofi Kingston, it doesn't look like WWE have any rematch plans for him against Brock Lesnar so moving him over to RAW could be for the best. It's unlikely that Kofi will challenge for the Universal Championship any time soon on RAW but he could be a great challenger for AJ Styles' United States title.