Yorick actually has very little means of escaping, so if he is ganked from early on he can be gimped enough to the point where he is not a large threat. He becomes incredibly tanky, so make sure you try to get him early. The later you gank him, the more levels in Omen of Famine he'll have and be much tankier. Once he's level 3 he also will be able to throw up all 3 ghouls for 15% damage reduction making him very tanky. Many champions can lane against him by farming his ghouls. They give no gold, but Tryndamere and Nasus scale better into late game and give them means of gaining strength in lane. Tryndamere gets it by hitting the ghouls for rage buildup and actually end up healing off of his skills from lifesteal and Bloodlust. Nasus gets power by building Siphoning Strike charges off of the ghouls.
[Source.](<httpSource://www.lolpro.com/guides/yorick/65-yorick-guide-top-lane/tips-tricks-synergies-and-counters) http://www.lolpro.com/guides/yorick/65-yorick-guide-top-lane/tips-tricks-synergies-and-counters