Best Hosting for High-Traffic, Cloudflare-Optimized Site?

I’m the CEO of wikiroutes.info, serving millions of users monthly. Our site's speed and responsiveness are critical, with a specific focus on optimizing for Cloudflare. With our user base's distribution, it's crucial for us to partner with a hosting provider in Europe or the US that ensures lightning-fast internal speeds between Cloudflare and the hosting service.

Could anyone recommend hosting providers that excel in these areas? If you've managed high-traffic sites, I'd be grateful if you could share the name of your hosting provider, your site's URL, and its monthly traffic. Insights into your experience with Cloudflare integration, especially regarding server location and internal speed, would be incredibly valuable.

What hosting are you using, how does it perform in terms of traffic, and what has your experience been with Cloudflare integration?

PS: And yes, ChatGPT helped me phrase this since English isn't my first language. No shame in that!

Our website, wikiroutes.info, utilizes various map layers for different countries, and in our mobile version (90% visits), maps are disabled by default to optimize user experience. Our crowdsource editors often require access to the freshest layers from multiple sources for comparison purposes. It's important to note that the audiences of OpenStreetMap (OSM) and wikiroutes.info partially overlap, and by using OSM, we inadvertently promote their service as well. While we appreciate your concern about our use of OpenStreetMap's tile servers, we've never received complaints about this practice before. It's worth noting that our project brings significant social impact to the community, akin to the contributions of OpenStreetMap.