I am 100% in on Bieniemy.
I'm a big Andy Reid fan, always have been. If Bieniemy brings nothing else to the table, he would still be installing a system that has been at least marginally successful with just about every quarterback its ever featured. I'm talking Kevin-Kolb-is-an-NFL-quarterback successful. I can't believe that Bieniemy hasn't absorbed at least a little bit of Reid's approach to developing quarterbacks.
Also, Reid is almost universally respected within the NFL. That's absurdly rare. That's why I think Reid's coaching tree has been more successful than someone like Belichick's. Every single coach off of Belichick's tree has inherited his absolute cuntiness and tried to replicate that culture - none have been successful on the NFL level. Reid has John Harbaugh, who is respected by his team and has won a ring. Reid has Doug Pederson, who is respected by his team and has won a ring. Reid has Sean McDermott who, whatever you have to say about him this early in his career, clearly has put his young quarterback in the best possible position to be successful. I don't know why you wouldn't want to take a chance on a branch from that tree, especially when you're talking about Reid's most overwhelmingly successful assistant to date.
I am plenty of for this train.
I would also say I would give serious consideration to any of the OC's who work under offensive HC's that have recently developed a young QB into something successful. We have seen a lot of young guns come in the league and find success lately, we need to bring in someone who knows how to do this and try and replicate it, preferably with Sam, but if Sam is irreparable, then with the next guy. Without diving into all those situations, the teams that jump to mind at the Ravens, Texans, Chiefs, Bills, Cardinals. Or even your teams with just wildly successful offensive schemes, 49ers, Rams, Seahawks etc.
I don't hate going into the college ranks, but you gotta be sure you are getting a guy that can win if he can't hand pick his talent. That's why those elite college guys fail, when they can't recruit better talent than everyone else, they can't compete. Lincoln Riley seems like the best bet in the college ranks, but I can't see him leaving unless Oklahoma wins a title, or he gets paid zillions to walk away. If I was trying to dip back into college, I would be going after Harbaugh at Michigan. We have seen what he can do in the NFL and how he can develop QBs.