Greythorne - because of the way he presents her in the final three sections, & the fact that she doesn't get a hearing until then. It's all about the structure of the text.
I teach a Controlled Assessment on the presentation of CW: Steinbeck controls our initial access to CW in exactly the same way as her 'dh' does wrt everyone else on the ranch. It's a huge part of the purpose of the novel that we are obliged to be complicit in gazing at her in the same way that the men do.
When she first gets a voice, in chapter 4, she uses it to threaten a black character with lynching. A less clever novelist would have made her a straightforward victim, but Steinbeck forces us to see that the only power she is allowed is sexual & that she uses it unpleasantly after being told to get lost - she uses it to drive a wedge between the men because they reject her.
& then she is allowed to share her dream in section 5, but the illusion of finding a listener is just that - Lennie couldn't care less about what she has to say.
If you look at section 6, Steinbeck is fairly explicit in his pity for her.
Tbh, I think he's decidedly patronising about it. Which I like, when teaching top sets at least, because you can get into the evaluative stuff that you need for A* - he obviously intended this as a sympathetic portrayal, but is it really? How limited is it because of the writer's intention, & how much because of his own mindset? How is our evaluation affected by being C21st readers of an early C20th text?
I don't think TTOTS is misogynistic, either. Shakespeare's heroines (& villainesses) jump off the page precisely because he gives his female characters so much more ooomph than most of his contemporaries would've dreamt of.
I'd imagine Lady Macbeth or Richard III's mum would've wasted no time in telling Curley's Wife a few home truths when it came to not taking any shit off the men in her life! The message of OM&M is that her options were effectively non-existent - as for pretty much every character in the novel.