Picking Maid of Honour is nauseating, how to make a decision?

I have two best friends and I don't know who to make maid of honor.

Tanja is my only friend that I still have from childhood. We are very close, we share many experiences, secrets and familiarity.
I met Clara at school in London when we were 15 and we were moving.We've been inseparable ever since, and the fact that I moved back to Germany didn't change our deep bond.Tanja sometimes has strong feminist views. She doesn't think much of marriage because, in her opinion, her parents should have divorced long ago. She thinks children are nice, but currently the total career killer for her. She vows to never make the same mistake her mother did and has been living unconventionally since their last relationship. Friendship Plus and so on. She's had one night stands on several business trips. She doesn't weep after the men.Amusing when she tells her stories but how can someone like that get involved as a maid of honor?Still, she would be surprised if I didn't. I suspect she expects it anyway.
In addition, over the years I kept getting the feeling that something was hanging in the air, a slight tension. Sometimes she bitches me and I don't know if that's where it comes from;
In drunken moments, she would reveal to me that she was attracted to me, and had one or two advances. I always found it funny, but in quiet moments I wondered what was going on when she said that. We had never talked about it and since their love affairs are always men.
Clara, on the other hand, is very different from Tanja. She lives for romance and is traditional. Unfortunately, she is deeply unhappy in her relationship. For years she has been waiting and hoping for a proposal and her boyfriend just keeps putting her off. He was also violent towards her. Instead of freeing herself, she continues to hope. She revealed to me last time that she can no longer begrudge people when they get married because she really wants it for herself.Then how am I supposed to make her maid of honor if she's bitter?But I know that she would be devastated if I didn't involve her in my planning.
After appointing Tanja and Clara as bridesmaids, should I explain why I chose Katharina instead?Katharina will be happy but will be surprised because she knows how good friends I and Tanja are.
This is one thing, the other is:We have a circle of friends consisting of: Tanja, Mir, Katharina, Sara, Cora, and Annette.
We regularly do things together as a group. However, from the group I would only choose Tanja, Sara and Katharina as bridesmaids/maids of honor. Annette and Cora are new to the circle of friends. And while we all get along super well, I have no desire to appoint her as bridesmaids, but I'm afraid that would make it seem like I'm excluding her from the group. What is the best thing for me to do here?
As you can see, I'm trying to please everyone somehow, although I've made up my mind not to do it anymore. People pleasing can be so exhausting. But I don't want to disappoint anyone.