Jonathan's speed is slightly outdated, he's able to blitz a dude who could blitz a dude who has baseline high hypersonic perception in his second key (idk why jonatahn's is outdated, other part 1 dude's like will aren't).
Though I'd actually wait a tad on Hamon matches, new Hamon info just came out in the recent magazine (had a Lisa Lisa one shot, featured a Hamon graph as a bonus).
He used mind control in combat, twice, (he thought he used it by mistake a third time too but he didn't, he was confused for a moment) and Caesar used it too. And Lisa Lisa but she's hilariously above Jonathan, if she does something exclusive to her, it doesn't scale to anyone else.
And bombs, well, to be fair, Jonathan is no stranger to giant **** off explosions.
Jonathan's actual WinCo diction would be sleep inducement, mind control, loss of conscious, biomanip, body control, I'd say organ failure but I doubt Jonathan would do that, he also has decent range, though it changes on environment. Can be anywhere from a few meters to tens of meters.
Do note Jonathan can also heal cuts, stabs, broken bones and even a broken neck, and make Hamon shrouds that can block gunfire, debris, and more.
Though he can't do shit about time stop so like yeah he's kinda ******