Hi, different providers tend to do better in different aspects: some have better overall success rate, others tend to have faster connection speeds or have bigger IP pools. Tho, when it comes to top providers, they're all great and it usually comes down to what your budget is. Not to promote any proxy service here, but there's quite a few guides/ tutorials on them, eg. https://proxyway.com/guides/best-proxies-for-instagram
Hope this helps!