I haven't caught up with the manga (IRL just sucks sometimes ), but I do know that Shirayuki tends to go to her own path than to be dependent on others, even to her own love interest. That's what has been established since at the beginning and still holds up. She may not be any different, but she has the smarts and resourcefulness to go.Shirayuki is one of the few female leads who has a romance that starts early in the manga but doesn't always have to be about Prince Charming... she literally spends entire arcs (if I'm not mistaken, years) away from Zen focusing on her own goals/job as a pharmacist. And she's a sweet person to boot. As a waifu she lacks that certain edge or distinctive appeal that other candidates may offer, but she really doesn't need all that.
That said, I like to indulge on the finer things in life, so I'll probably vote Boa Hancock
And the odds are against me here, but I'll still do my outmost best to campaign