Complex sentence: The original members of the group were Walsh (guitars, keyboards), Joe Vitale (drums, flute, keyboards) and Kenny Passarelli (bass); all of the members contributed vocals and songs, although Walsh was the principal singer and songwriter.
Split into simpler sentences: The original members of the group were Walsh (guitars, keyboards), Joe Vitale (drums, flute, keyboards) and Kenny Passarelli (bass). All of the members contributed vocals and songs, although Walsh was the principal singer and songwriter.