Here are my thoughts on your list:
[name_f]Tahlia[/name_f]-Gorgeous! It’s elegant, grows up well, has a strong woman feel yet is sweet on a little one. It’s unique too, but not too out there. It goes nicely w/your crew.
[name_f]Eliza[/name_f]-This is also a fabulous choice. I almost think that [name_f]Tahlia[/name_f] goes a little better w/[name_f]Maddison[/name_f] & [name_u]Darcy[/name_u] if we’re being nit-picky here.
[name_f]Ella[/name_f]-I love this, but I personally like it better as a nn. It seems sort of short. It’s also really popular if that’s a concern for you.
[name_f]Evie[/name_f]-Really. cute & nice w/your girls’ names. Also better as a nn in my opinion.
[name_f]Mikayla[/name_f]-Meh, I don’t care for this one. The spelling seems off, & it’s just sort of trendy. At least consider [name_f]Michaela[/name_f].
[name_f]Olivia[/name_f]-I love this one. A beautiful bold classic. It’s again, very very popular. And it’s a bit fancy w/[name_f]Maddison[/name_f] & [name_u]Darcy[/name_u]. Although [name_f]Maddison[/name_f], [name_u]Darcy[/name_u] & [name_f]Livy[/name_f] would be adorable.
Well, I’m no help! I think [name_f]Tahlia[/name_f] is my pick, but you’ve got a great list. Maybe take them all to the hospital & let the baby pick.