Best hosting for discourse?

“10.000 visits” does not really tell anything about your resource needs. Your users’ behavioral patterns will dictate how much computing power you need. Personally I have been on UpCloud.com and they have top notch performance (much faster than Digital Ocean) and great reliability (disclaimer: I have partnered with them). I can honestly recommend them and you can scale your server size according to your needs.

ScaleWay.com has a new interesting product line called “Workload intensive”. Very affordable and they are solid as a provider. You could also try them and please report back how it works.