I've had a lot of success with the RFM69 radio transceivers on 433MHz (but much less success with LoRa transceivers for some reason). There's a load of information on the LowPower Labs website and their forums about their Moteino range of boards and the varieties of RFM transceiver modules that can be used with them. They also have their own library for the RFM modules. I've had much more success with their own RFM library as well.