When using each combined with or , which is correct:
Each individual or group is happy.
Each individual or group are happy.
Each individual or group is filled with laughter.
Each individual or group are filled with laughter.
When using each combined with or , which is correct:
Each individual or group is happy.
Each individual or group are happy.
Each individual or group is filled with laughter.
Each individual or group are filled with laughter.
I would use "is" here, and I think "are" is incorrect. A group may be composed of many things or people, but it is a single thing for purposes of this sentence.
In general, I would use
Each A or B is .
and never "are" in this construction. Even when B is in itself a plural noun.