Based on the limited public info, it's going to be Tate or Jarren. While I did think Tate would win this job outright a few weeks ago, I do think Jarren has shown a level of consistency that no one has been able to meet. Tate has shown flashes but has issues with his mechanics and consistency. N'Kosi is a turnover machine and has issues with his deep ball. Manny and Enos' said their #1 criteria for a starting QB is to not turn the ball over. N'Kosi, unfortunately, has consistency issues in that area.
All-in-all, based on the speculation and limited practice reports, it would seem that Jarren is going to get the nod. Would not be surprised though if Tate was the starter (with a very short leash, as would anyone else).
Let's all be thankful our QB room has moved on from being Malik Rosier, N'Kosi Perry, and Evan Sheriffs. We're miles ahead in the QB room compared to where we've typically been over the past decade.