Cow elephants first, bull elephants second.

I think these two are by far, more dangerous to the hunter before the shots are fired than the other Dangerous Game Animals.
Also since you usually shoot elephants closer than other DG they are more dangerous immediately after shots are fired.

If the animal is shot, goes down, and you can see it, then I think the cats would be most dangerous on the APPROACH because they are so quick.

If a DG animal is shot and gets out of sight, then you have a follow up. On the FOLLOW UP, again I think the cats would be the most dangerous because of the combination, they are sneaky and are harder to see than the larger DG.

As I look at I do not see where cape buff are dangerous at all....

Just kidding. Buff derive their danger from the fact that they can soak up a lot of lead, and when they do charge they are hard to stop.

Still I think elephants are head and shoulders above the rest.
Especially when you shoot them close.
And why would you want to do it any other way???