Embarrased to say this - 5 month old baby still isn’t officially named. Please help

I’m spinning in circles and would appreciate your help as my husband at this point doesn’t care. He just wants me to pick a name

  1. Costas Leandro Benoit

  2. Costas Leandro Thales

  3. Nico Coast Leandro

  4. Costas Leandro Nico

Had name regret with Costas so want to be sure with his middle names. (his nickname is Coast). So this has to be a part of the equation. Would feel too weird to drop it now.

We live in Canada but heritage is Greek. Hence Costas as first name. I wanted Nico as first name but wasn’t 100% sure so let husband decide and he picked Costas. Now I have to decide on middles… why 2 middles? So he has options if he doesn’t like his first. And he will most likely be my only baby. (Lost my first, he was born at 23 weeks old and didn’t survive long. And I’m 43) Leandro would be an honor name.