Is there actually a way to get the cook and the others at the same time?, because i chose a cook when Jean asked. but from the screenshots it shows all three of them being there.

no. you are limited on who you can recruit. you only get one of khenbish, themba and wolf, and one more if you have arts background. in the future, only the leader background will be able to recruit both pedro and nikos. this game is very keen in making it impossible to do everything in one run. you will need multiple playthroughs to see everything