Earlier this year there was a lawsuit where Led Zeppelin was sued by the existing members of Spirit for stealing a riff from one of there song for "Stairway To Heaven."
Spirt best known for a song called "I Got A Line On You" had a song from their 1968 debut called "Taurus'' in which they claim Zeppelin stolen from.
I won't type either songs since many know Stairway but type up Taurus and decide.
I think there is a similarity.
But here's 2 other such cases.
Almost 40 years later John Legend recorded this tune.
There's avideo for it but there's a part that's a bit off so I posted this instead.