Have the Best Hitters, What are the best Pitchers

I have 99 Mantle and the rest of the gang that comes with but my pitching is terrible. What are the Best Starting Pitchers/ Relievers ?

Kluber, Newhouser, Pearson, Kopech, Mize, and Oswalt are the best 6 SP. In that order.

Feller is not bad. I like him better than Kopech. I got lit up with Kopech regularly.

Thanks. I will try some of these guys out, I only used Cluber, Nolan Ryan, and live series pitchers so far