Team participation

I have worked with teams and sometimes there are individuals who do not effectively communicate. Their language is domineering, confrontational, dismissive or just not in the positive spectrum. Now, I hesitate to bring it to their attention but sometimes I have in a round about way. I also see how this causes lack of involvement from other members. Everyone is afraid of disagreeing or putting their opinion as well as ideas upfront. To this end, the progress stalls because no one voices a need for scheduling a meeting or get some work done. Question: What is the best way of communicating in such a team environment?