I think mcadoo is the front runner at this point. Josh McDaniels will and should get a look.
I think the people hoping for Sean Payton will be disappointed.
I'd rather have McDaniels. I see McAdoo's first job going the way McDaniels' did. It's pretty difficult for a young guy with only 2 years as a coordinator under his belt to take over and lead an NFL team. McDaniels learned that the hard way, as did many before him, including that guy who coached the Browns and then turned down the Jets job -- can't remember his name, but he was actually a DC for a long time.
I like McAdoo. I hope he stays. But this notion that a wunderkind can take over a crappy team and lead it to success in the short term is fanciful, IMO. In baseball, sure. In basketball, maybe. In football? Nope. Two guys have won SBs in their 30s: Tomlin and Gruden. Both took over teams with WAY more talent than the Giants have. And Gruden had not only been a HC previously, but he had also been a coordinator for a couple years before that. Tomlin was short on experience but, again, he was taking over a team that had been to the playoffs twice in the previous three seasons.
Long story short, this team needs a kick in the rear by someone who knows what he's doing, not a nudge to get them over the hump.