Unless you are planning on staying in cities with 5G service, it isn't going to happen. While there are some areas where 4G LTE service meets your requirements, as you move into rural areas, your speeds are going to drop below 50 / 10.
As to choices, while there are satellite services that could meet your requirements, they are not mobile, and very expensive. There are satellite based systems currently being developed that will work, but they are years away. You will pretty much need to stick with cell service & its limitations for the near future.
In my case I don't require the data speed & volume you are asking for, but carry both an AT&T & Verizon cellular modem (Jetpack) and have generally had 6-8 MB down & 2-4 MB up when I had a connection. I've only had a few locations where neither provider lacked coverage (Big Bend NP in Texas, Cades Cove in Smoky Mountain NP to mention 2). I do carry a cell amplifier for the fringe areas.
I'm currently sitting in my house in Upstate NY just outside a small town of 10,000. Not quite rural, but not near a large city. AT&T shows 23.3Mb down, 1.3Mb up, while Verizon is 9.3Mb down & .8Mb up. Both show fairly low signal strength.