Everyone here is downplaying the Thu’um hard. In ES lore it’s extremely powerful (way more so than in the actual games). Even basic users can knock down castle doors or rip people apart. Strong and knowledgeable users could manipulate time and space. It is after all the blessing of Akatosh the god of time. It also has the ability to unmake aspects of reality. Shit is crazy powerful.

I thought for the longest time that the LB was the weakest protagonist, but if they fully understand their Thu’um they’d stand a chance against either of the other two. You literally have to go for the throat early or by surprise with powerful Dragonborn, because they become near unstoppable if you don’t.