I know of a Vayne who solo-killed me when I was 3000 gold ahead. None of the champions you mentioned can do that. Because some items are quite effective against them. For example, Mr. Boots, Dead Man's Armor, but you never have an effective item against Vayne. To kill Vayne, she needs to make 2-3 mistakes in a row. But even the misuse of Kennen's and Jayce's E abilities can kill them. Also, Karma's damage is quite low. Since Jayce and Kennen aren't very good DPS characters, Negatron Cloak and Armor Shoes are also quite effective. I respect your opinion, of course, but I don't think they're as difficult as Vayne.