First of all, everybody who's just coming out of the woodwork now to say 'This isn't a tournament, nobody compares skills, it's all about popularity!' I have one question? Where were you all during Enel vs Blackbeard? The Closest fight we've had in this tournament, both sides giving strong arguments, and most importantly actually analysing abilities rather than just saying 'Shanks is cool he can beat anyone!!111!1!'
Now, back to this fight - I'd honestly give it to Whitebeard, if only due to the amount of damage he caused while so injured and ill. WB, when he went mad and started stomping people of Akianu's standard (who, by the way, is still one of the strongest people in one piece behind the 4 Emperors and Rayleigh), had been stabbed repeatedly, shot with lasers, and on top of all that was dying anyway. I'm not going to talk about 'healthy' Whitebeard in this, as we haven't seen 'healthy' Whitebeard fight. But, for a bit of WB's power context, in the Battle for Marineford Squard stabbed him, Aokiji froze him, Akianu hit him with a magma attack, various marines stabbed him, Kizaru shot him with lasers, and after all that he still had enough strength left in him to practically OHKO Blackbeard AND Akianu in very rapid succession.
I appreciate Shanks is strong, as is up there in terms of the strongest OP characters, but all Shanks has done in the series so far in terms of feats is show he can spar with Mihawk and Whitebeard, and block one of Akianu's attacks with a sword. Now, bearing in mind at this point Akainu had already been beaten up by WB and fought the majority of the WB pirates, it's not all that impressive. Shanks's great conqueror's Haki won't do anything against someone as strong as WB, and while he has shown almost godly haki levels WB isn't exactly slouching either...
Plus, WB with his Nagatina and Gura Gura no mi provides him with a little bit more versatility - If he swings his Nagatina with his right arm in a wide arc while his left summons a shockwave, Shank's one arm really becomes a disadvantage.
Also, Sachsenhesse, I hope after spending the entire tournament voting against those who showed less feats, you didn't just vote for Shanks :P