With the right soil you nearly can get everything growing, i also had a butternut pumpkin in a big pot, surrounded by lots of flowers and this one also gave me 3 perfectly grown butternut pumpkins, could have been more and more space is better for sure, no discussion about this - but in the end it works if done properly, at least with the big pots you can see on the following picture for example, 80l to 120l were used if i remember correctly atm.

Mostly seen at construction sites.^^

They look even better right now, at least besides the fact i did not have time to take care properly, so they have grown a little wild, but no problem. :) As said, it's a lot each day. Yesterday it was about 30 big flesh tomatos besides at least 50 smaller ones of different types. :)