Those temps are fine. "Best" fan curve is subjective. You can prioritize lower temps over lower noise, or vice versa. Or just leave it how it is.
Wow...speaking as a current FX owner, I am so looking forward to the day that it breaks down & I can replace it. Seeing CPU temps labeled as "good/OK" that, for my CPU, would be "Warning, MechWarrior, overheating" for my CPU makes me just a tad bit jealous...