I'm searching for an adventure Manga where either the group gets closer with each other and form a bond (Like Zero kara Hajimeru Mahou no Sho where they went from complete strangers to friend).

Or a Manga where the group has to deal with many perilious situations like they comrades death or getting crippled (examples are "Hai to Gensou no Grimgar" and "Dungeon ni Daei").

I hope for your suggestions!

You could try Tenkuu Shinpan, but the 'perilous situations' include really graphic violence. It's a survival horror manga, so it might not be quite what you're looking for, but it certainly brings the characters together.