Question about Yorick

In laning phase, what are you supposed to actually do against him? This isn't meant as a QQ thread, I'm just genuinely confused and seeking to learn. I played against him as Gragas top a little while ago, and I admit that I felt somewhat helpless; all-in didn't work, and when I tried to harass he just used E. Any general advice, or was Gragas vs Yorick just a bad matchup for me?
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