Complex sentence: Wesley Geer, better known as Westyle, was one of the founding members of the band (həd) p.e., and their main songwriter, guitarist and leader, also programming many of their hip-hop styled beats.
Split into simpler sentences: Wesley Geer, better known as Westyle, was one of the founding members of the band (həd) p.e., and their main songwriter. He was the guitarist and leader not to mention programming many of their hip-hop styled beats.