My memory isn't perfect, but I definitely don't remember Oden as the unanimous choice. It was 100% certain that Durant and Oden would go 1-2 in some order, but that was a pretty open debate.
The Wiggins-Embiid debate mirrored the Durant-Oden debate in some ways as well. Oden would have been the #1 if there were no health concerns, and that was certainly the consensus at the time. A weaker consensus also circled 2014, with a sizable minority embracing the opinion that a 100% healthy Embiid would be a sure thing and a much better pick than Wiggins (Parker muddied the waters a bit, too, because he was actually the considered the *safest* pick by most everyone).