Ideally we'd be able to sell the fringe players and get the Gyokeres sell on to bolster funds. I'd probably prefer to look to sell Sheaf ahead of these three.
But taking the question as stood, the sensible option has to be MvE.
Of the three his value is probably the least so you'd be doing the nest business. Plus a RB is going to cost less to replace (although we would need two). He'd be a big loss, but that money could lead to an overall improvement.
Having said that, one of my biggest fears with MvE is that pace plays a big part in how good he is. He gets an injury and loses that a bit then i think he could struggle.
Of the other two Rudoni is just a no. He's young, chips in with goals and assists from midfield and looks like he's only going to improve, especially with Lampard as mentor.
Wright I can understand why people would accept losing him. He's at an age where he's probably at his peak value and he can be incredibly frustrating. But he does have a habit of putting the ball in the net, and that's worth a lot in this game. So if we sold him for that amount then we'd have to spend most if not all of it on someone who could do the same. It'd have been nice if Simms had kicked on this season and Wright wouldn't be such a miss, but sadly he hasn't. If someone offered around £20m (I know that's highly unlikely) then I think I'd take that.