After MANY trial and errors in my production house, we've determined that the Rec. ITU-R BT.709-5 color profile works best for our workflow between the art department and motion graphics department. It allows better color accuracy for client revision with the PDF and is very similar to the standard Rec.709 Gamma 2.4 so that our broadcast safe deliverables looks good.
I don't know if it is a recent thing with 2020 version of After Effects, but every imported media (mainly Shutterstock and Gettyimages) comes pre-interpreted with Rec.709 Gamma 2.4 and if we don't go manually interpreting them to Rec. ITU-R BT.709-5 (our working space profile) they end up looking to dark, which is actually an expected behavior.
Is there a way to make the media import to After Effects without assuming the profile, or assuming the working space profile, or automating it to import with the correct color profile assigned to our specific LUT? This is actually important, because on our time sensitive workflow, it is actually common for our artists to forget manually interpreting the imported footage on a daily basis. And, yes, I know that you can remember and copy the interpretation to multiple media files, but you still need to do it on the first file anyways.