I have a feeling that all intel macbooks with UHD 630 are the best. These are exact same family of graphics used in those well praised thinkpads with UHD 620. And for some reason, I can see these are not easy to get, quite rare on second hand market. Usually you have plenty of Iris, Iris pro models and those with discrete AMD graphics units. But never seen someone aiming to make discrete units permanently on, rather its wise versa, perhaps because those are not very good. In terms of money to value ratio, it seams like it is way better to waste money on multiple units of used devices, instead of getting a shiny but shity new one. Unfortunately.
Update:
Actually disrehard above, its all wishful thinking on and on and on. From device A to device B, from device B to device C. And then you spend so much time tinkering with all these device and forgot about device A. And then it all goes again from device C to device A, ..., ... On and on and on and on. Gemini suggests the probabilty of you having eye strain on any new apple device is very high if you did experience eye strain with apple device. So lets leave it there 🙂