I think Sawyer Eleanor would be very cute! Sawyer Marian, Sawyer Cordelia, and Sawyer Alys are nice, too. I like Merit Maxine, Merit Ruby, Merit Eleanor...and Asher Flora/Florence, Asher Eleanor, Asher Marian...I like Ophelia/Ofelia and would work with either pronunciation and any of your firsts except Felix, too much "fee" (I also just can't take Felix on a girl seriously...Sawyer is fairly unisex, Asher and Merit are masculine but if she hates that she can use Ash or Merry as her nn, but Felix would leave her with no nn options but Fifi...and no one over 4 is going to want to go by Fifi) I'm not sure why you want such masculine first names instead of saving them for a boy and using one of your gorgeous middles as a first for a girl... Maxine would give you the boyish nn of Max but not force her into life with a boy's name, have you considered Maxine as a first? Rowan and Maxine/Max would be very nice together! Maxine would work with pretty much all of your middles! Maxine Sawyer would be cute, too.
Arabella or Evangelista but I never suggest the parent consider something else because I don't like their style. It's rude and condescending to be honest.
I'm sorry, I didn't intend to come off as rude or condescending. Felix and Silas are great names, they just aren't unisex names in the eyes of most of the world, so weird looks and questions are going to follow every time she introduces herself. It's not the end of the world, but it might be hard to live with, especially if she's very shy or self conscious, being named Felix would draw a lot of unwanted attention and assumptions. I was a shy kid and would have been very stressed out by stuff like that. I like the idea of something like Maxine, nn Max, because it gives her options. I love when names give kids options, especially if it's an unusual name, because you never know how the kid will identify. A bubbly, outgoing, rough and tumble little girl might love being a Max, but a shy, bookish girl might prefer to be a Maxine. Silas or Felix on that shy, bookish girl might be very uncomfortable for her. Of course, you're the mom and if you have your heart set on using a traditionally masculine name on a girl then go for it, and hopefully your kiddo will have the personality to carry it happily, and doesn't care if people are always asking if her parents wanted a boy. Even with a simple, traditional name like Anna you couldn't guarantee that she'll like her name, I suppose.
I really don't want to hurt your feelings or anything, it's just my honest opinion on the names. I love your taste in girls names and would be delighted to see you use one of them as a first name. Rowan and Flora? Or Cora? Or Maxine? Or Alys? Or any of your beautiful choices? So great! And no need to defend yourself/herself against the "but that's a boy's name" comments, since they do seem to bother you and they aren't likely to go away. I won't personally say another word about it in your threads, though, because you have my opinion already now. I will just say I like your middle name choices very much and think they are worthy of being considered for the spotlight of being first names. :)
Don't get mad, but realize that if you go against taboos, not everyone is going to agree with it. Names in English normally signal gender (unlike in some languages, like I understand Tibetan is rather unisex). I read a great article (I think it was on Nameberry) by a man named Chelsea. It was interesting to see his perspective, as most of the things that happened to him were unintentionally... i.e. being assigned a locker in the girls' locker room, people thinking he'd stolen his gf's credit card (and making him provide an id), etc. Some people will stand up saying, "The genders are the same, why distinguish through names?" While I can see where they're coming from, I'd recommend taking a bit to consider the practical, real-life ramifications of having a boy's name as a girl. After all, the male Chelsea (whose name was not feminine when he was born) did demand an explanation from his parents on why they used it... and I think all parents (regardless of the name they choose) should be confident enough with their name choice that if their child demands an explanation, they are willing to take responsibility for their decision.
Out of all of your choices, I like Maxine, nn Max... Maybe Maxine Fay?