Thanks for the slime manga recommendations 
Personally, I’m team slimes are cute and need to be protected, so here are a few of my picks, that I havent seen so far here:
とんでもスキルで異世界放浪メシ | 22
Campfire cooking in another world got the cutest slime of them all. The MC picks up a baby slime who will become a strong companion. The anime is worth a watch cause the voice acting for the slime is top notch!
ぷにるはかわいいスライム | 22
Puniro is a kawaii slime features an antromorphic slime, that got accidentally created by an elementary school boy. They become friends and grow up together.
私の推しは悪役令嬢 | 29
One of my favorite genre are villainess isekais and this one features a slime as the pet/child of the MC, so of course it was a must watch for me. In the anime the slime doesnt play a big role, but I have high hopes it will become more important in the manga.
スライム聖女 | 24?
Well, as I said, next to slimes, villainesses are my favorite thing. In this manga a slime wants to become human so it takes over a recently deceased body, only to find out it has become a super important saint who had been the worst villainess and is hated by everyone.
These are just a few more recommendations, but there are many more out there 
