Your stock choice sounds interesting and should make for a lively and fun to watch tank. Some questions though.
I have forgotten what substrate you have in the tank? Larger chunky, sharp stuff isn't the best for corys. They like to sift and root through sand or much smaller grained substrates.
Just throwing some thoughts out there. In my mind, with your stock choice you'll have 4 different feeding styles between the pleco, corys, gourami and tetras in terms of the speed they're able to get at and eat food. All the fish will be fine, but the corys and pleco each have their own feeding needs. A new tank also won't have bio film build up for the pleco to skim on.
I used to feed my corys quality sinking pellet foods
For my BN plecos, I buy those mini pickle sized cucumbers. I peel them and shove a SS fork or big SS screw into them so they'll sink to the bottom. For me with multiple BNs, nothing but the fork or screw remains after a day or two. They come flying right out and squabble over who's gettin' on the pickle first... That didn't sound right.