you have to see that the good site is something relative, relative in the sense that it has sites with high rates but faster in the transaction and there are sites slow in the transaction but with lower rates.

in case you need a fast site I recommend you:

coinmama.com

but it has a bit high fees compared to other sites, but they are very fast when executing bitcoin purchases using visa or mastercard

note:

I used this site a lot a year ago, so I don't know if they still have that good performance they had

you will also have to have a verified account

https://www.coinmama.com/faq