Okay, here you have it... Looking at the "Post-Rodgers Era". This is from 2023 onwards, and limited only to coaches who have been with their current team since at least 2023 (i.e. no first/second year coaches).
Regular Season Win Percentage
T1. Sean McDermott 0.714 (35-14)
T1. Dan Campbell 0.714 (35-14)
T1. Nick Sirianni 0.714 (35-14)
2. Andy Reid 0.653 (32-17)
3. John Harbaugh 0.646 (31-17)
4. Sean McVay 0.633 (31-18)
T5. Sean Payton 0.612 (30-19)
T5. DeMeco Ryans 0.612 (30-19)
6. Matt LaFleur 0.602 (29-19-1)
T7. Kyle Shanahan 0.592 (29-20)
T7. Mike Tomlin 0.592 (29-20)
8. Kevin O'Connell 0.571 (28-21)
9. Todd Bowles 0.531 (26-23)
T10. Shane Steichen 0.510 (25-24)
T10. Mike McDaniel 0.510 (25-24)
11. Zac Taylor 0.469 (23-26)
12. Kevin Stefanski 0.347 (17-32)
13. Jonathan Gannon 0.306 (15-34)
Postseason Win Percentage
1. Andy Reid 0.857
2. Nick Sirianni 0.800
3. Kyle Shanahan 0.667
4. Sean McDermott 0.600
T5. Dan Campbell 0.500
T5. John Harbaugh 0.500
T5. DeMeco Ryans 0.500
T6. Sean McVay 0.333
T6. Matt LaFleur 0.333
T6. Todd Bowles 0.333
T7. Jonathan Gannon, Zac Taylor, Kevin Stefanski, Sean Payton, Shane Steichen, Mike McDaniel, Kevin O'Connell, Mike Tomlin 0.000
Total Postseason Wins
1. Andy Reid 6
2. Nick Sirianni 4
3. Sean McDermott 3
T4. Kyle Shanahan 2
T4. John Harbaugh 2
T4. Dan Campbell 2
T4. DeMeco Ryans 2
T5. Matt LaFleur 1
T5. Sean McVay 1
T5. Todd Bowles 1
T6 Jonathan Gannon, Zac Taylor, Kevin Stefanski, Sean Payton, Shane Steichen, Mike McDaniel, Mike Tomlin, Kevin O'Connell