Who is the strongest biotic?

I think that Jack is an exceptional biotic, one that there is a reason why we don't see full cutscene power in gameplay, and one that I would love to explore and explain my reasoning behind it, but I don't think she is the most powerful one we've seen. Or, at least, the most potent one. Samara displays some exceptional skills and, as already stated Aria is also a formidable one. Ultimately, my vote would go to Tela Vasir, though. And what an amazing fight that was, to boot.

Don't know that I agree.  Kaidan can Reave, which is apparently very unusual for a human.  I don't see Liara as more powerful than Jack or Kaidan.  Miranda knocked the crap out of an asari during her LM.  So, nah, I'm going to say asari aren't necessarily stronger than humans.

The only reason the asari have the edge is because they live long enough to train.  Give humans a thousand year lifespan and I bet you they're the equal of asari.

I did say jack was likely the most powerful HUMAN biotic  not the most powerful biotic

I'm willing to say Jack is as powerful as an Asari at any stage, also willing to say Adept Shepard is the same.  Maybe specific Asari like Aria are more powerful, maybe not.  Asari aren't better than humanities best even Kaiden is powerful for most Asari.  Asari have a higher bottom but their peak isn't necessarily any better even after 1,000 years.

Just because one asari may be a weak biotic and one human an unusually strong one, doesn't mean that overall asari aren't more powerful biotics than humans, or any other race. Why? Because their homeworld is full of eezo and they have evolved with it over millennia. Meanwhile, eezo exposure is more likely to give a human cancer than biotic abilities.

1) Samara she had centuries of combat experience and knew how to use her powers in ways others couldn't use. Plus she was one of two biotics who could use biotic shield to safely get through the Collector's base.

2) Liara might be technically the most powerful biotic in the series because the singularity power was supposed to be hardest power to master and she used it easily, but she lacks the combat experience of Samara, in terms of raw untapped power Liara would hands down but again she lacks the centuries of experience that would make her even deadly then she was at the end of ME3.

3) Cora Harper. Like Samara her experience makes her more dangerous and deadly because she actually KNOWS what she is doing.

4) Jack. She is easily the most powerful of the human biotics we've seen but she's not trained and even in ME3 she still untrained and her attitude doesn't help.

5) Wrex. He's a krogan battlemaster and a powerful biotic (at least by krogan standards) maybe not as powerful or as trained as those above are and we really don't get to see it as much as the others.

The rest are:
6) Peebee
7) Miranda
8) Jacob
9) Thane
10) Aria

He pulled those mechs over the ledge in ME2, BADASS