Against today's Wlad he would stand no chance. A few years ago before Wlad properly shored up his defence... Maybe he might have a shot. Similar with Vitali. Definitely couldn't beat him at his peak, but might have a small chance of dancing around current Vitali. I'm just saying maybe, I'd still make outside-prime K2 favourites.
Haye would destroy him. Just too fast and powerful.