There are very few men that got in on their first ballot - in fact most don't. No one could deny that Michael Irvin was going to get in, yet the voters made him wait.
Absolutely, Ray gets in first-ballot.
Michael Irvin is a poor analogy, though. Not becaue of his "impact on the game"... but because of his position. It's notoriously tough for WRs to get in. Just ask Cris Carter. There are several HoF worthy WRs still floating around out there, to this day, who have been waiting for years. In fact, there are only 7 post-merger WRs in the HoF, and two (Jerry Rice, Steve Largent) WRs ever, who have gotten in first ballot.