If you're referring to dadicated VPS then the most used vendors out there are Linode, DigitalOcean, Vultr and Host1Plus, they are not managed though. These kind of servers are best for people who have certain server management experience, and for the most part, to make most things easier, people also use control panels like cPanel, Plesk, also some alternatives with less features but more acceptable prices like Runcloud, VPSrobots.
What will be your monthly budget? Do you have any location preference? As you have not mentioned VPS or Dedicated server hosting, I won't be able to recommend you best provider. Let me know one the above mentioned points.
After 5G coming in India, I plans to buy a office and setup data center there which will come really cheaper compared to buying hosting.
The dedicated server as a hosting solution is becoming outdated in the era of the major public cloud hosts. Web hosting companies like GoDaddy & WPengine run their entire data center service platforms on AWS & Google Cloud hardware. VPS plans can be configured with all of the features & hardware specifications as dedicated servers for a cheaper price. What is the advantage of a dedicated server over an elastic cloud solution like AWS EC2 or Kubernetes that can scale past one server limits to support any amount of web traffic under a "pay as you go" approach? There is around 1% performance difference of VPS vs. Dedicated due to the virtualization software installed which is unnoticeable for most applications.
You can try Temok.com, they offer dedi servers in 8 countries and all servers all managed by them, Live chat support is great and on time.
I'd recommend going through https://fdir.co/category/hosting-type/dedicated there are plenty of options.