The most useful monster.

I think it's very problematic to definitively state which unit is better.
Because there isn't a single "best" unit; each one is useful in a specific situation.
Under certain conditions, for example, depending on the race your opponent is playing...
So, it's a matter of knowledge and experience...

We all know that without you! And it's obvious that it depends on the situation! You should rather vote for the most useful unit in your opinion! If you don't know how, I'll tell you: name 3 of the coolest units in your opinion, starting with the best. This will make you more interesting than repeating a phrase I've probably read five times in this thread, as well as many of its variations!