Straightshitter 

A person who so straight forward and honest they make you shit your pants

Dude that Marlena chick is a straightshitter, told me I was talking too much on the first date!

Straightshitter by Robotneedsoil July 7, 2020

Straightshooter 

An earnest-talking, micromanaging, office-jargon aficionado who has no hands-on knowledge of company procedures or logistics

Straightshooters rarely take their duties very seriously, but it's important to them to appear diligent in order to gain acceptance and power within the office hierarchy.

Straightshooter by Robert Lanham, Author of Food Court Druids, Cherohonkees, and Other Creatures Unique to the Republic August 4, 2004