I still have a maxed out 2013 MacBook Pro 15 (with a 47W i7-4960HQ and integrated Iris Pro 5200 GPU only). It's dead silent most of the time and plenty fast enough for general work and running external WQHD display as a second screen.
My main computer now is a maxed out 2016 MacBook Pro 13 (with i7-6567U). I has not problems pushing LG 5K display next to it (two displays setup).
I'd go for a 28W CPU such as Intel Core i7-1068G7 in a MacBook Pro 15-16" with thin bezels and great cooling system (it could pretty much run at 3,6 GHz all the time when needed, while idling at 2,3). Would be dead silent like 99% of the time, plenty fast enough for general work and have amazing battery life. External GPU is all it takes to get the desired GPU performance on request. This, or 45W GEN10 equivalent of i7-4960HQ from Intel.
IMO - for all the work I do and like 90% of computer users I know - modern powerful integrated GPU with all the codecs support is a perfect choice. Dedicated GPU in a notebook for those who do not need it = extra heat, noise, power consumption and potential point of failure, nothing else.
It would be awesome if one day Apple brings back an option to purchase 15" MacBook Pro only with a powerful integrated GPU (or rumoured upcoming 16"). I am sure it will find quite a lot of buyers.