- Namecheap
- Cloudflare
- Route 53 (if on AWS)
Any others?
The only issue I experience with Namecheap are included redirects which have something like 90% uptime.
Route53 domains is seriously not needed for anything - just add zone in AWS and point your registrar to new NS.
If you're already hosting on AWS, then you'd only have one potentially hostile company to deal with instead of 2.