I'll be honest there is nothing in here I'd consider forgotten tbh.
My Friends Over You - New Found Glory
Despite one of their members being a pedo and Chad Gilbert being a borderline creep and overall shitty guy they had some good old stuff, shame they never grew out of the punk stuff until 2017 when Gilbert just tried to copy his ex wife's album style.
Dammit - Blink 182
Their breakthrough hit that only Blink fans seem to remember despite being a great track.
Some Might Say - Oasis
Despite being Oasis' first No.1 Hit in the UK this is so forgotten about in What's The Story? (Morning Glory) despite being the best track on the album.
Five Colours in Her Hair - McFly
(Read as McFly Discography) Completely unknown outside of the UK but a cornerstone of nostaglia for anyone growing up around the 2000s.