I'd say the general consensus theory on this is as follows:
1.Samara
1b. Morinth
2. Jack
3. Liara
4. Wrex/Miranda/Kaidan (Kaidan's an L2, so his biotics spike higher than most. Miranda's biotics were genetically enhanced, while Wrex has more experience wielding them)
7. Jacob (he's clearly and prominently stated as being a biotic, so it's a strong point of his)
8. Thane (more or less an afterthought. probably not as powerful as the others as he focuses more on using weapons and tactics to kill than raw biotic power)
as far as NPCs, assume that the Asari are NPCs are the strongest (the older the stronger), then I'd say humans or Turians, lastly Krogan. Can't think of any other race with more one known biotic...
EDIT: as far as Shepard goes, I would say that an Adept Shepard would sit somewhere between Liara and the Wrex/Miranda/Kaidan range, maybe closer to rivalling Liara.
Vanguards and Sentinels would most likely be on par with the W/M/K group.
Modifié par Ice Cold J, 13 février 2012 - 04:59 .