Are your temps fine: Yes.
Can your temps be lower: Probably.
Does it matter with where the temps are now: Probably not.
I think you're doing fine. I suspect that a better case with more airflow might pull those temps down and an AIO liquid cooler would as well but they're not bad. If you're using a budget case and it really is bothering you, I would upgrade the case before anything. Make sure you have good air flow then everything, including your CPU, will run cooler. Lower temperatures are always better for longevity (until you start thinking about LN2 and stuff like that.)