Who's the most important Turtle overall?

[Prowler]

In theory, they should ALL be equally important. Even though Leo is the leader, he shouldn't be more important or visibly a better fighter than his brothers.

But in practice... there's a lot of inconsistency throughout all the different versions of the property.

Don's scientific and engineering knowledge and feats in the Fred Wolf cartoon and FW-related stuff are so absurd that the Turtles would all be dead without him rather early in the series.

In the 2k3 series, the writers sure made Leo look like the most competent Turtle overall. Without him, the Turtles would not survive in tough battles at all.

Mikey is the opposite. In many versions outside of Mirage, he's basically the most useless Turtle. Since he's too goofy, immature and stupid to the point that even his athleticism and speed don't favour him much at the end of the day. "If Mikey died, the Turtles would get depressed and the heart/soul of the team would be shattered!" some will say... and they wouldn't be if Leo, Raph or Don had been the one to die instead? Not to mention losing the qualities those 3 have/offer...

Raph, I dunno. Someone who's hotheaded is not a very good idea in battle or when going stealthy. He is canonically the strongest Turtle, I guess, but it's not like I've seen much evidence of that. It's not like he's MUCH stronger than the rest of his brothers.

I haven't seen/read everything. So I'm just talking about anything up until Turtles Forever, basically.