There's a bourbon trinity/trifecta by ID10-T that he uses in his The Back Nine recipe. If you read the notes in the recipe he goes a bit more in-depth on their different characteristics.

VT Bourbon
FLV Bourbon
TFA Kentucky Bourbon

Thats where I'd start.

They don't add flavoring to whisky, it's the oak that gives Bourbon it's flavor. Bourbon flavorings are made to be used as an additive in sweet desserts so you have to ask yourself if you want a desert whiskey vape because that's what they will all provide, and you'll likely end up with a sweet candied whiskey icing profile.