tl;dr: find and buy your supported ipq4019 device for the quick and easy solution. If you like to enjoy 11ax wi-fi and SQM shaped routing capacity of 400+ Mbps: find your preferred available mt7622 model.
What about Linksys MR8300? https://openwrt.org/toh/linksys/mr8300
Qualcomm IPQ4019 should be able to route 200+ Mbit/s with SQM: IPQ4019 cake performance? - #4 by jeff
ath10k based wireless routers are well supported and mature. Linksys MR8300 is available for around 75 Euro in the EU. If this model is too expensive or the availability in your region is too low - there are more ipq40xx devices to look for: https://downloads.openwrt.org/snapshots/targets/ipq40xx/generic/
If you could spend some more money on the router: mt7622 based models provide hardware offload. I bet you will be able to find a mt7622 model from this list: https://downloads.openwrt.org/snapshots/targets/mediatek/mt7622/
mt7622 can easily route 400+ Mbit/s with SQM: E8450/RT3200 gigabit speeds tweaking? - #6 by elan