i need help picking my Bridal party!

My Fiancé wants five groomsmen. Two are his brothers and three are his very dear friends. Unfortunately I only have three very close friends, one of whom is a guy (hooray for bridesman!). It's important to me to keep the two sides even, so I have two options.
Originally I was planning to pick my two close coworkers. Ive only spent time with one outside of work (even gone to her wedding!), but we've sort of formed a clique. Unfortunately here lately there's been some mild drama with them, and I'm worried that will carry over to the wedding. On the flip side they are both really fun and know how to party.
My other option is to ask my sister and my fiancé's daughter (currently 13 and 14, don't judge). If I don't do that I'll include his daughter in the ceremony in a different, more meaningful way. The main reason I'm so resistant to this is that would only leave me with two adult women in my bride tribe, one of which is very conservative, so any bachelorette shenanigans will be a little less exciting. On top of that my sister is a HUGE drama queen and cries 300 times a day. (Apparently she cried through church the other day because she didn't like our mom's outfit).
So there's my predicament. Any advice??