Danny Trevathan? He's good, but I wonder if Denver will let him get away. They don't have a ton of cap space right now, and have to get Von Miller signed, but they'll free up a lot of cap space if Peyton is done.
A TE who could be a possibility is Dwayne Allen of Indy. He had a poor year statistically this year because they kept him in to block a lot, but he has some receiving ability. He's had some injuries, but was pretty good in 2012 and 2014.