Verizon has historically had the edge because of 750 MHz (Band 13)
I've been a customer of theirs for years, and like you, I barely ever use more than 1/2 GB of data. I always preferred the VZ network in my area as well. Not sure if VZ carried over the tradition, but TotalWireless used to run nice Black Friday sales on low-midrange Android phones as well. I highly recommend one of the Motorola phones around the $200-$300 (less on sale) price point.
I also tether and it just cuts into my ordinary data.
If you’re already am Xfinity Internet subscriber, it’s even cheaper, and the app makes switching between data plans dead simple and achievable within about a minute from the app.
I subscribe to the cheapest option, and if I ever need more data, I just bump up the plan for the rest of the month.
Switched to US Mobile (which as long as you have a 5G capable phone, puts you on their high-priority QoS tier) and haven't had an issue since.