It seems like over the last few weeks Manziel has come back to the pack a little in some scout's eyes. Some of the national guys have been downgrading Manziel on their big boards. ESPN's Kiper and McShay each released their updated boards today, both put Bridgewater and Bortles ahead of Manziel. McShay dropped Manziel from 18th to 21st.
The NFL.com guys who have released big boards (Jeremiah and Brandt) both have Manziel as the top QB prospect (Brandt has Manziel as his #1 overall prospect). Charley Campbell has Manziel ahead of Bridgewater and Bortles as well. However after looking at a lot of the major draft site's big boards released since the end of the college football bowl season, Manziel is on average the 3rd highest ranked QB. Brandt lists him #1 overall but the next highest is 7th. The lowest I've seen him 38th and 32nd.
All the major ones have Bridgewater as a top 10 prospect and he ranges from #1 overall to 10th.
Bortles is on average the 2nd highest ranked QB. I've seen him as low as 6 and as high as 30th but his range is the 8-12th ranked player primarily.
Derek Carr is 4th on every board that lists a 4th QB and he averages the low 30s with his low being 21st and his high being 40th.
The rest; AJ McCarron, Mettenberger, Boyd, Garappolo, Fales, etc appear here and there but their names don't pop up unless you see a list of the top 100 or 200 prospects.