Well, I'd have to disagree. I think he may have been more consistent, but I'd take Sehwag or Hayden's more aggressive styles anyday.
Maybe, but its a very great player who dominates all types of bowling on all types of surfaces. I can't think of a modern day batsmen who can claim that. I think it almost counts against Hayden nowadays that he was so dominant on batsmen friendly pitches. I'd never pick Langer over Hayden simply because when Hayden gets his eye in, he is on for a monster score, which is a skill in itself.
No one I don't think is suggesting that Hayden would be picked over any of those guys, although Boycott is an argument for sure. Hayden is completely disregarded as a FTB on this site and I think its very very harsh. He averaged over 40 against every nation expect NZ. Yes, he struggled more away from home, that's true. Let's compare to Sehwag, who averaged less than 30 away from home against 3 of the top 7 nations he had to face. Meanwhile Smith was more consistent, but less exciting and overall averaged less than both players.
You can throw a blanket over the 3 of them, but for me, Hayden was the best. He can be overrated, I've seen him in AGT teams which is wrong, but he's underrated around here I would say.