are you asking for a translation in english? The thing/problem, etc is that any word you may receive would carry a lot of connotations, rather than denotation. There is a term for this in psychology/psychiatry but i dont have it at hand now. Maybe "gregarious" is close to it.
In a more informal, casual way i ll add "sheep", (noun), or "sheepish (adjective) people". But i guess there are hundreds of words you can use for this.