I see what you're talking about and I would say Ari Shapiro has the most annoying voice.
But that's completely separate from the issue of journalistic integrity. Even if they're similarly grating you wouldn't argue that Joe Rogan is roughly comparable to NPR in terms of journalistic integrity would you?
Depends what you mean by biased. The NPR is mostly listened to and made by a certain center-left cosmopolitan personality type and that does show in some of the stories they choose and how they cover them. I can understand if you don't like the NPR aesthetic like the voice thing Zank mentioned above and some of the story selection like the spinster host interviewing the spinster author about being a spinster that I mentioned earlier. But in general you get dry, sober analysis that is held to high standards of journalistic integrity. What source of news do you believe is less prone to bias and adheres to similar if not higher levels of journalistic integrity? Personally I think if you could only have one source of news NPR would be one of your best bets. To the extent that there is bias there I find it very easy to filter out while still getting nuanced coverage of current events.