Well, considering that he walked out of the coalition against him, with still a significant amount of influence, and that he had the state of mind to burn down Luo Yang, in a sort of "Hey, if I can't have the capital, no one can!" kind of way, then it shows that he had the resources, the military might, and ruthlessness to be capable of conquering the land.
Liu Bei would not have survived a coalition; He couldn't even survive against Wei. It's the same for Sun Jian/Sun Ce/Sun Quan; They couldn't survive a coalition, either.
The only person I find capable of surviving a coalition is Cao Cao; Even Yuan Shao wouldn't be able to survive a coalition, as he couldn't even survive Cao Cao.
Cao Cao might not have even survived had it been Dong Zhou as a member of the coalition in his place.
And that is exactly why Minister Wang Yun developed the Chain Plot; He saw that Dong Zhou just might be the leige to rule the land, and didn't want a tyrant, like Dong Zhou to rule the land. So, he knew the only way to do it was to get his best general, Lu Bu to turn on him and assassinate him.
Charlie Murphy: "Prince, you got any towels; It's hot out here!"
Dave Chappelle (as Prince): "Well, why don't you purify yourself in the waters..of Lake Minitanka?"