The best way to beat a Gravekeeper's deck is to get a field spell and Field Barrier before they can. Or just use Consecrated Light and negate all his monsters. Unfortunatly, you generally have to either A: build an anti-Gravekeeper deck, or B: build an anti-everything deck to defeat these guys. I use an Earthbound Immortal deck that's either hit or miss against them, but all my decks are virtual and on YGOPro ^_^; not to mention it's a deck I refuse to share.
[hider=So instead I listed an original brew they might not see coming]Blue-Eyes White Dragon *3
Tri-Horned Dragon *3
Alexandrite Dragon *3
Koumori Dragon *3
Red-Eyes Darkness Metal Dragon
Black Luster Soldier - Envoy of the End
Chaos Sorcerer
Shinato, King of a Higher Plane *3
Dark Master - Zorc *3
Dragon Shrine *3
Dragon's Mirror
Foolish Burial
Advanced Ritual Art *2
Shinato's Ark *2
Contract with the Dark Master *2
Dimensional Prison *2
Call of the Haunted *3
Dark Bribe *3

Five-Headed Dragon
Number 22: Fran Ken *2/3
Number 87: Queen of the Night *2/3
Hieratic Sun Dragon Overlord of Heliopolis *2/3
Queen Dragun Djinn *3[/hider]