You people do realize those things can blow off nukes, right? That means Bleach-wise we're talking Yamamoto and . . . yeah, that's about it.
*God I can't believe I'm doing this* Ok, if we're going to talk Bleach then we have a few options. Ichigo could probably do it somehow. I don't know if Getsuga Tenshou could break through an AT Field, and I wouldn't be surprised if it couldn't, but maybe Final Getsuga Tenshou could. Even if normal Getsuga couldn't Ichigo could just keep hammering at it until it breaks down since he's supposed to be like a bloody endless well of energy or some shit and I doubt an AT Field could survive an endless battering if the attack was strong enough. At the very lest if Ichigo couldn't do it now he could do it by the end of the series since he's only going to get exponentially more powerful. I also doubt an Eva could hit him since he's so bloody fast.
Second choice is the latest big bad, Juha Bach.
That doesn't guarantee success for him, though, since his attacks might not be as effective against an AT Field. I'm less inclined to believe he could do it then Ichigo but really we don't know enough about him and his abilities yet to know his full potential or style.
We also have Espada #2 (I've forgotten his name) as Alaska said. Here's a perfect case of power ranking not being the most important part of the equation. Starrk might
be able to do it but I pretty much have no doubt #2 could. I doubt even an AT Field is immune to degradation over a long period of time.
Now, the other thing with Bleach characters is that, besides blatant power levels and explosions, some have powers that are more strategic. Could Aizen's shikai go through an AT Field? If it could does it matter whether the target's looking directly at it, is it like Geass where if you look at it through indirect means, such as the monitors or whatever the pilots use to see outside the Eva, it doesn't work? Maybe that was answered in Bleach but if it was I don't recall. I doubt it works like Geass, though, so I'd wager Aizen could just use his mind games to trick the pilot into thinking he killed Aizen, lower his AT Field, and then kill them.
Shunsui's also a possible choice. The effect of his Shikai seems to come from the body of the target rather than a projectile or spell that moves from his sword to them, so if they don't play the game right he could probably destroy the Eva directly.
And, of course, there are still numerous captains and visored who's bankai we don't know, including Aizen and Shunsui. Plus the current villains that follow Bach whose powers we know almost nothing about, Zero Squad who we know exactly nothing about, and the Spirit King, whatever the hell he is.
Really, the big question when discussing the viability of Bleach characters remains, like every single other fictional character, the AT Field. Would it block Aizen's shikai? Would it block Shunsui's shikai? On a related note, would it block Geass, and would Geass work on the Eva (but obviously not the pilot)? Sadly, or not, we'll never know.I feel so dirty.