They peaked with the pop perfection that is "What Makes You Beautiful" ...which I would argue IS memorable. But everything else felt lackluster in comparison.
WMYW exists tho, they were bigger as a band, they will remembered by the group not the music like the Jonas Brothers, I mean they have BurningUp but not let's act that it was a big track, it is only remembered by young people and it wasn't a hit.
The only people who care about 1D are their 13 year old fanbase who have the attention span of a flea. It's essentially their fans fault why they don't have any remembered hits Lolz.