I feel like the obvious answer is bourbon, but there are so many different ones it's impossible to say what's best. Include other whiskeys, ryes and it becomes the great unsolvable question.
I think my favorite is dandelion wine, which a friend made for a party by picking dandelions and making the wine themselves. Quite good, and also quite strong
Old Grandad is a bourbon, but it's about a 30% rye mash bill, so it can be a nice middle ground. The Bottled in Bond version was really good when I could find it.
The Oriental cocktail was one of my favorite ways to have it other than straight up. It's like a Manhattan and a Margarita had a baby.
1.5 oz rye
0.75 oz sweet vermouth
0.75 oz orange liquor
0.5 oz lime juice