Any of the guys from the FKT trio could solo.
An Espada like Stak or Ulquiorra is enough to beat King Piccolo or kid Goku
@GeneralVan: Ulquiorra is actually well beyond city+, likely Island level. Lanza was bigger than Las Noches, which takes 3 days to walk (in 3 days you can cross over 100 km).
KP also can't take 1000 ceros to the face, when each cero can destroy multiple city blocks.
Since you like to use OBD calcs, Soul society arc Ichigo is mach 29+: http://www.narutoforums.com/blog.php?b=21505#comment170382. Base Ulq can one-shot him
@supernova7005: We'll leave that for another time. Goku at this point should have H2H skills to match any of these 3. He also has the Kamehameha, which is more powerful than any attack these 3 have. And flight can be cancelled out with his Power Pole. It's basically Gin's Bankai although not as deadly. However, I don't think Goku can keep up with the various traps, but he has Zanzoken and Solar Flare in his arsenal. Close fight. His ape fist should also counter and even overpower Shunko.
I'd say kid Goku is a now a mid-tier in the HST
You must be joking, he'd still be higher-tier. How many mid-tiers in the HST are hypersonic+ and are city-busting+?
And AOE, or even destruction feats in general, aren't everything, I thought people knew this. Ulquiorra's lanza would be at least city-busting, yet neither Aizen nor the likes of Isshin or Urahara ever showed anything on that scale.
Kid Goku would likely still win against any of them.
@supernova7005: City level+, like Ulquiorra and Starrk. And Tao was calced to be Mach 20, and old KP was stronger and faster than him.
Stark is city level? When the hell was that decided?
@GIRUGAMESH: If Aizen or Isshin can beat Ulquiorra, who is well above city level they should also be able to beat kid Goku who is not any higher.
As for Stark, he can fire 1000 ceros with his Cero metralletta. Each of these ceros can destroy multiple city blocks.
He also has Cero Oscuras, which should be stronger than this city level Cero Oscuras by R1 Ulquiorra
The Trio wins without much difficulty. He's (barely) city level at best, and we see Isshin and Yoruichi wailing on a solid city-level+ fighter like Chrysalis Aizen. Goku is also lacking in speed here. He's fighting against a top tier speedster, a tricky genius who blitzed Aizen, and a physical powerhouse.