My trapezius muscle lines aren't pretty. Are there any places that do shoulder fillers well?

Now that the weather is getting warmer and clothes are getting thinner, I’ve become really self-conscious about my shoulder line.

I heard that finding a place good at shoulder fillers is the answer to getting straight shoulders, so I’m searching, but there is so much information that it’s hard to choose.

If anyone knows of a place that does shoulder fillers well to create a nice, right-angled shoulder line without looking too artificial, I would really appreciate it if you could share the information!