My friend dared mento rate all Amami ships do Here we go :p
Rantaro x Kaede — persnally, I dont ship this one but its really cute (7/10)
Rantaro x Kirumi — Eh, could be better. I dont ship this or have any personall opinion on this (3/10)
Rantaro x Ryoma — I can't see Ryoma in a relation ship, sorry (1/10)
Rantaro x Korekiyo — I love this one, I wish there would be more fanfics about them! (9/10)
Rantaro x Anige — i see them more platonic but also i Can see them as romantic couple! (7/10)
Rantaro x Tenko — no. (-10/10)
Rantaro x Gonta — I can't see them together, sorry (3/10)
Rantaro x Miu — I like this one, dont really ship it but i would Like them in platonic way! (5/10)
Rantaro x Kokichi — cute, i like them together, calm boyfriend x energic boyfriend (9/10)
Rantaro x Kaito — basically, Idiot x idiot (9/10)
Rantaro x K1-B0 — I love them <3 we need def more fics about them! (10/10)
Rantaro x Tsumugi — no. (-10/10)
Rantaro x Maki — platonic but i Can see them as romantic couple! (6/10)
Rantaro x Himiko — its Just seems clearly platonic to me (4/10)
Rantaro x Shuichi — I love them!! No comment Just love them!!! (10/10)
*bonus*
Shuichi x Rantaro x Kokichi — love them! Just imagine them in Phantom theif au, Rantaro would Just basically work for Shuichi but secretly help Kokichi!