Relative clauses

[Bassim]

I am wondering if these sentences are correct? Is the punctuation correct?

1. He was just another politician who will self himself to the big company.
2.He was one of the oldest players in the team, who had been playing even before some of his current team-mates were born.
3.This is an unusual novel which the critics do not take seriously.
4. He was a painter who used to paint only landscapes.

[bhaisahab]

I am wondering if these sentences are correct? Is the punctuation correct?

1. He is just another politician who will sell himself to the big companies.
2.He was one of the oldest players in the team. He had been playing since before some of his current team-mates were born.
3.This is an unusual novel which the critics do not take seriously. OK.
4. He was a painter who used to paint only landscapes. OK.

Bhai.

[Bassim]

Bhai,
Thank you for your quick reply