How many can you guess? (Swiss artist Exem's tribute to Tintin's "Blue Lotus")

I think I can make out 17 characters (including the two creators in yellow), or at least I know who their artists are. That includes at least 3 American characters. (I'll add my guesses in comments, below)

This art was used as a poster for the Basel cartoon museum's exhibit, last decade:

(right click as needed)
[(original link)](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgy-jl4setVLjuBXk_3gdOkwrJ7Bmi9R6AiKDyU2a6qzpVgUKbMurfN25MF2fRL0ZaP9sL3JhMkpkGNNN1F_yujkOzeXbTA5h0Yq-pBzSdOTSU2ePji_c3ymtRLKpFRwYYHkXhz_w/s1600/cartoonmuseum+basel+poster.jpg)

Original image here:
https://piefed.social/c/eurographicnovels/p/1937271/tintin-tuesday-a-panel-from-the-blue-lotus

More on Exem:
https://www.bedetheque.com/auteur-4983-BD-Exem.html