Hulkenberg is good, and will become better. But he hasn't snowed anything extraordinary on a regular basis so far IMHO (except pole in last years race). Old Rubens beat him in nearly every Q and race.
Kimi would have given excellent results, and be back in F1, from where he NEVER should have left (that stupid finn!). Regrettably there were some negative talk before last season, where he was rumoured to Renault. He (again a stupidity!) said to the press they were misusing his name to get attention... had he kept his mouth shut then he could have had his big opening now! He said he'd only return to a team that was capable of winning the championship. Most drivers are happy just to be in F1, or at least that's their view when they've been close to leaving...
Timo Glock, Adrian Sutil or Jarno Trulli would also be very fast in a good car. And more than happy to get away from lesser teams...
OR - whip out Mika Salo or Mika Häkkinen from their stables... I'd LOVE to see Mika give Schuey a bloody good hiding!!!
8th championship... yeah, right...