I've been hoping for Sven. Not because he is fantastic (because he isn't) but because he seems as the best available/attainable alternative. He is a solid manager, an improvement on MON and very unlikely to be a complete disaster.
Hiddink would be fantastic (but, I fear, completely unrealistic). Jol would be very good (but seems also to an unlikely appointment).
Houllier is about on the same level as MON, but with a different profile.
Curbishley would be a step backwards.
Koeman and Klinsmann would be risky.