To be honest, yes! Its mainly a maintenance thing because this whole 'inches per gallon' rule is rubbish... you have a lot of happy bottom dwelling fish and lots of open space at the top and so whatever you add shoal wise, you wont be over crowding so long as the live higher up.
So long as you control you water parameters, you will be fine to stock heavier than that! Its not just about overcrowding, its water quality and knowing your species temperaments and personalities which is something you learn with time and...well... experience! If you add more fish and find your nitrates creep up, do bigger regular water changes!
I had a 260L tank that was seriously heavily planted but I also had about 100 fish in there and running off just a 405 canister. But I also had the benefit of lots of plants and a 50% weekly water change (that actually could have been done once a month but the plants tint the water green and I hated that
). I also had fish that wouldn't normally live together but because of the tank layout and heavy planting, the fish rarely ever came into contact with each other! I had a fighter, breeding pair of kribensis, trio of croaking gouramis, pair of honey gouramis, pair of pearl gouramis, a shoal of cardinals, a shoal of rummynose, a shoal of chela (bit like a cross between danios and hatchets that live near the surface) and a shoal of male cherry barbs and about 10 corydoras.
Was an obscene amount of fish really but at any one time, you couldn't count more than 20-30 because of all the plants, the water was spot on perfect all the time, even when a work experience student cleaned filter under the tap, there was barely a blip in the readings.
The Siamese fighter kicked the female krib out the cave and it lived in the cave with the male krib (weird huh!?) and everything else just got on fine! But I had cories at the bottom, kribs had a cave to one side of the tank (so if they got territorial, they guarded a corner, not the entire tank!) and I planted what was effectively a shield around the kribs cave entrance to discourage tetras getting too close by accident. Cherry barbs live in the plants without coming out much, cardinals shoaled loosely in and out the plants at mid/bottom level and rummynose just above them with chela and pearl gouramis at the top and croaking and honey gouramis in and out the plants mid/top level.
Everything I added, I planned for their personalities and adapted tank as needed
Its not difficult to work out if you avoid species that just love to irritate the heck out of everything else... like guppies, dwarf gouramis, sharks, yoyo loaches etc.