I don't have time to do a full critique right now sadly, but to offer my opinion on this question here:
I definitely think they can! I looked through the first 3 parts (1.1-1.3) and I think that realistic proportions can definitely work for this style of comic. The area that I think I would focus on would be to take more liberties in exaggerating poses and expressions where appropriate to help sell the comedy especially if it's going to be more physical slapstick-esque comedy like this. I doodled a few examples from 1.3 below (Excuse the poor lighting
):
So far it seems like a lot of your poses are just really rigid and stiff and your characters don't emote very strongly. When someone's happy, don't be afraid to make them really happy! When someone busts out the world's tiniest violin to mourn their soon-to-be-shark-bait crewmate, show some of that lightly sarcastic sorrow on their face.


The third doodle is just a really small and crude rework of this panel:
Right now the guy doing the pushing is standing almost completely straight up and barely giving a shove, and while falling guy is leaning over, it's also at a rather tame angle. Push those lines of action
The mischievous crewmate can really give the guy a big shove, and you can comedically see the guy's body bending around the point of impact as he tried (and fails) to maintain balance.
If you practice some things like these, I think your character designs and art style will do just fine! But it can be loosened up and exaggerated to better effect, I think 