I think Davis and Williams will be gone by pick 16. Too many teams in the 5-14 range with the need to let them go.
Trubisky is definitely going top 10.
I see very small chance any WRs go top 5 simply because there are better players at other positions and these teams drafting high have major needs.
Most teams drafting 6-15 really don't need a WR, at least not a WR1. Teams like Cinci, Buf and Car need complimentary WRs, so would they really spend their first round pick on one? Maybe, but these teams also have big needs at other positions and probably think they can get a WR later.
The Jets could in theory be a landing spot for a WR, but they don't even have a QB and they also have massive needs elsewhere. Seems unlikely they draft a WR to me.
NO could draft a WR as they just traded away a very good one, but they also just drafted a very good WR last year and have major needs on defense.
Philly and Arizona are the two teams I would be most concerned about taking WRs early, but likewise they both have more pressing needs at CB. To me they are both 50/50 in taking a WR. I think it is likely that one of them grabs a WR, but unlikely they both do.
I guess what it comes down to is how highly teams rate these WRs. If they think they are top 10 players in this class, then there is a good chance 2 or 3 are gone. If they rate them more in the 10-25 range it's much more up in the air.