I used Hippo Insurance for my most recent single family investment property in Houston because they gave me the best quote of the 5 different quotes I received. I can't vouch for anything other than the price as of right now because I am still a new customer with them and have not gone through the process of making a claim (knock on wood). I imagine that their customer service is not going to be as good as some of the other insurance companies like the big name ones that you mentioned, but compared to all of the other prices I saw for insuring a rental property, they were by far the best.
I would recommend using an insurance broker also, so they can shop around for you to help you get the best deal.