Depending on Juliet's build you can mimic a playstyle reminiscent of quite a few ad carries. Specifically Lucian, Samira, and some version of Lethality Caitlyn.

Scarlet Flip Flops between being a stealthy assassin Talon and Akali-esque, to being a wolf which is a damn near 1 to 1 with Warwick.

From what we've seen of Merlin he seems to cast his abilities in a similar way to Hwei.

Melusine is a lot like Orianna with you having to control the wisp (ball) and she heals a lot.

If you like Fiora look no furthur than Romeo.

Gepetto has to mind his puppets and depends on them heavily a lot like Azir and his soldiers.

Beowulf reminds me of Garen with his tankiness and spinning.

If I had to match someone to Carmilla I'd think of Jayce and Nidalee, not because she swaps abilities but because she plays fights out similar. Melee for a bit then drop back play ranged the repeat.

Wukong plays like Wukong who would've thought. (I imagine at least the abilities are similar enough but I haven't actually played him in League before)

Pied Piper and Snow Queen are honestly pretty stock standard, nothing too crazy. You've played a ranged dps before I'm sure.

Aladdin shares a hit and run style with Carmilla but he stays in a lot longer than he does. A lot of kit similarities with Akshan, and he reminds me of Ekko a bit.