What about trading Carroo to the Chargers for MLB Denzel Perryman. You might have to throw a 5th rounder into the mix.
Don't know much about Perryman and won't claim to, for some reason his name and Chargers ring a bell. Was he the backer that held out rookie season of OTAs and such and then was seen on video playing kickball or some sport? I know it was a Charger, just can't recall if that was him or not. With that said, Chargers will probably end up making a trade at some point in season when their WR core is riddled with injuries as usual.
As for what OP stated, don't see it happening for a few reasons but mainly because the Eagles were in really bad shape cap wise before the draft, with signing rookies and FAs and the likes, I don't see them taking on Landry with having to sign him long term/ Not taking Landry as a one year rental for 2 players and a 1st round pick.