It would be, and it will be Cory Booker.
Washington likes him because he's young, a decent speaker and an African-American, and they think he's the "next Obama". I have no doubt a bunch of major donors will be attracted to him because he's "electable" enough for them.
But frankly, like Jeb Bush, I see him as painfully moderate to the point where any left-wing Democrat can easily cross him out. In 2013, when asked if he was a progressive, he said he was first "a Democrat and an American." He's been described as fiscally conservative and socially liberal. He defended Bain Capital and private equity back in 2012 against Barack Obama.
I know plenty of people are comparing Gillibrand to Clinton in many ways, but Booker is every negative Gillibrand has maximized with hardly any of her positives.
But you pointed out the problem with the comparison he is a decent speaker which Jeb is not so he has a better chance of defending himself
It doesn't matter how well he speaks. He's too plastic. It's like he was created in a lab by his corporate donors in order to be the "perfect candidate."
He will be disowned and smeared quickly.