I would actually give a leg up to TF and TMNT in the sense that at least the original versions most people were exposed to initially had likable characters with distinct personalities and those things have been built on as those franchises have continued.
Optimus Prime and Megatron are iconic, truly. Sure the other Transformers were broadly drawn characters in the G1 toon but they had truly distinct mannerisms and quirks and designs that made them easy to tell apart (something the Bay films botched for sure). TMNT, whether comics, toons or films, is about the interplay of the four brothers, again, each with characteristics that, while broad, are linked with each individual.
MMPR? There's no "there" there. The situations, the characters... They've never been about anything other than the boilerplate "lessons" of any given episode. The characters (and actors) are so flavorless with little distinction. Of course they are color coded... How else could you tell them apart?