i don't consider ftfd to be melodic metal because, there's nothing metal about it
metal is about riffs, and shred, some speed, and to me it must have more to the vocals than screaming (it should be very expressive if there's no singing)
perfect examples of this are like children of bodom or in flames
then you have spin offs like power melodic metal, dragon force
or progressive melodic metal, soilwork / kamelot (two completely different flavors of progressive melodic metal)
there are some bands i make an exception for, like arch enemy. they are pretty melodic metal but have no singing. maybe you could call this heavy melodic metal.
bands who play chug breakdowns aren't metal. plain and simple. breakdowns came from hardcore in my opinion. so if you play them, then hardcore goes in your description somewhere.
and let me just say this loud and clear, it really fucking bothers me that the definition of metal has been lost with younger generations. people calling suicide silence metal just pisses me off.
and if you're curious who won the demo submissions, it was the band named "Vanisher". guitar player kyle odell although i hate their song the architect because its way too chuggy for melodic metal