Do these following champs currently do well as top laners?

Personally I feel as though Yorick is secretly OP in top right now, and if built to burst goes very well in pick comps, if built to seige he's very good at bringing extra pressure on the tower in the form of the extra Marksman. He's extremely versatile and doesn't really have any auto loss matchups, even hard matchups he can just farm and create pressure on the opposing team's tower by building a Zzrot's portal early. With no complete losses in top your teams jungler can focus on winning other lanes hard and snowball off tower gold.

Shyvana is risky because it takes a little to get strong but it can be viable. Skarner I say no. His passive is useless at top lane so you are at an immediate disadvantage. Singed and Yorick yes if you know how to play them.

I think Shyv is REALLY good top in certain matchups. Singed and Yorick i think are pretty decent as well, with certain matchups favoring them.

IDK if skarner is even worth picking atm tho