I'm fond of Gravekeeper's in GOAT format. They may not be the strongest but they always give me a strong sense of nostalgia.
I don't play Gravekeeper's the way regular GOAT players do. I revolve most of my plays around
Gravekeeper's Guard. I combine that with
Book of Moon and
Tsukuyomi to continually disrupt my opponent over and over until I can sufficiently reduce their LP.
I also prefer to run 1 copy of Terraforming as I've had a few matches where I've had difficulty drawing
Necrovalley..
Your opponent will often use
Nobleman of Crossout on Gravekeeper's Guard. Protect him with with
My Body as a Shield. I would consider even adding a third copy since my whole strategy pretty much revolves around Guard.