There is no one best hot sauce since it really depends on what you are going to use it on. To me, it has to have flavor, not just heat. If you want just heat, try Pure Cap. If you can taste it (most people can't), it is horrible as it has a burn pepper taste. One drop will take out most people, two will take out most others, but there was one person who had three drops without any issues.
Some of my favorites are:
Roadhouse Hot & Spicy BBQ Sauce
Mountainman Roasted Corn, Garlic & Chipotle Sauce
Both have different purposes.
Tabasco has a purpose, but I don't think it has much flavor. Added to catsup, with black pepper, it makes a better "sauce" for fries, but I think Tapatio works better, but it is not always available.