I love Eloise and Victoria (no nicknames), and Madeleine is okay, if not a little popular. I don't like Thomas, but feel it works well with the other names. Steve just looks out of place. Stephen could work without a nn, but not Steve.
I think the sibset sounds great together, and the names go so well. I like all of them individually and together. I can't say I'm crazy about Steve or Eloisey, though. Ria (much better than Vickie, though I like Tori) and Maddie are fine.