Here are the ones from my list of favorites that (I think) are not family tartans:
Bear
Canadian Autumn
Children First
Coarse Kilt
Common Kilt
Durango
Evergreen
Highland Village
Highlander
Maple Leaf
Marino
Spirit of Bannockburn
Spirit of Scotland
Spirit of Wales
Then there are these district tartans that I wouldn't have any trouble defending in front of the Tartan Police:
City of Rome
County Down
County Tryone
Cypress
Green Ridge
Hyland Day
Island of Innis
Isle of Arrand
Isle of Gigha
Isle of Skye
Rosscommon County

Regards,
Rex in Cincinnati