I don't have complete details for all the events, so if anyone wants to fill in information in replies, I can add stuff to the first post and make it more comprehensive.
There were several Vintage events at GP Columbus. I played in two of them.
Friday
15 players
Tom A., Vault Key Oath, 4-0
Dredge, 3-1
Neil Martin, Landstill, 3-1
White Eldrazi, 3-1
Worldgorger Dragon Combo, 3-1
Other decks included
Mentor Gush
Tezzeret
Dark Petition Storm
Golden Gun Oath
Rage Extractor Shops
Saturday 11 a.m.
8 players (this event competed with the main event)
Rick Gideon, UR Hellkite Control, 4-0
Ben Perry, 2 Card Monte, 3-1
Other lists included:
BUG Control
Rogue Hermit Combo
White Eldrazi
White Eldrazi
UBWg Gush Mentor Tendrils
Dredge?
Saturday 6 p.m.
10 or 11 players? (this event competed with dinner)
Ben Perry, 2 Card Monte, 4-0
Other lists included:
Living Wish Belcher
Esper Bomberman
Dredge
Dark Petition Storm
Sunday 12 p.m.
28 players
Jefferey Kraznoson (from Calgary), Hangarback Shops, 5-0
Nat Moes, Colorless Eldrazi a la Jaco, 4-1
Nick Cummings, Academy Belcher (no Wishes), 4-1
Arturo Garcia, URw Delver, 3-2
Matt Hazard, UB Dark Depths Landstill, 3-2
Ben Perry, 2 Card Monte, 3-2
Other lists included
Dredge
Dredge
Dredge
Esper Bomberman
White Eldrazi
Colorless Eldrazi
Tezzeret
Living Wish Belcher
Worldgorger Dragon Combo
TKS Shops
TPS
Landstill Oath
Gush Mentor
Nahiri Mentor
Dark Petition Storm
I'll see if I can get lists for some of the higher finishing decks.