Any recommendations for a good, fast and reliable webhost preferably with one clock install wordpress?
For WordPress specifically, take a look at WPEngine, Flywheel, Kinsta and Dreamhost Managed Wordpress. They’re all managed WP hosts that perform much better and more securely than typical cheap hosting with one-click installs. Costs are in the $15-25/mo range unless you have a lot of traffic or special needs.
I have an anti-recommendation: whatever you do, avoid OVH at all costs. Their support is the worst kafkaian nightmare I have ever encountered in decades of tech (which is quite a feat).
Not to mention occasional gigantic fires 
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Indeed… without backups.
A famous backup company: “Now that’s not what we meant by BackBLAZE…”
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Great recommedations! I will look into these. Thanks.
Does anyone know if I create a full fledged WP site on a subdomain, can I transfer that site to the root domain easily?
You should be able to. If you go with one of those managed options, they’ll have a staging/preview domain you can use and a one-click type deployment feature. You can also use a couple of other plugins like Duplicator to accomplish this.