I did a top 5 junglers so i wanted to share my thoughts on tops now and maybe ADC and Mids keep in mind this is my own opinion if you think differently post it as a comment.
You can't out sustain a malphite he will continue to harras you with his q and Lvl 6 will most likely go in for a full on combo.
Zed can escape from very sticky situations like from ganks or tower dives his shadow lets you harras a ton and deal a ton of damage as well as ult letting you juke out other ults like Fizz's.
He is able to extremely poke you constantly bringing down your health and blocking most of your basic attacks with his shield.
Pre lvl 6 he's only a little threat because he can out sustain but Lvl 6 he can get out of situations easily with his ult and save his teamates.
He will outpoke you, out sustain you and destroy you in most 1v1 situations.
Post who is your top 5 Solo tops!