User blog comment:AKA S.I.H/Who's The Best Spy?/@comment-24675861-20150817213959

In-universe perspective, I say Black Widow.

But I have to give my vote to Grant Ward from a out-of-universe perspective. When he was HYDRA, my jaw dropped. I thought it was May. Also, I can't predict what he will do next. That scene where he said he would teach Palamas to pilot, for her to kidnap Morse; excellent.

Morse got fooled by Simmons...O.K.

Fury is just sneaky and walks in shadows.

May doesn't talk so she is hard to read.

No Dottie Underwood? She gets the job done. She will slept with Stark; she will kill her best friend; he'll, she will hide a body in her room and still sleep there...