Opie Winston

Becomes SAMCRO's President following Jax's stepping down after being voted to "meet Mr. Mayhem."

Alexander "Tig" Trager (Kim Coates) Becomes Vice President under Chibs following Jax's stepping down after being voted to "meet Mr. Mayhem" in the series finale.

Happy Lowman (David LaBrava) is SAMCRO's Sergeant-at-Arms as of Season 6. His real name is never revealed.

Rane Quinn (Rusty Coones) is the former president of the Nomad Charter. He appears in Season 5 to help track down one of his former Nomad soldiers. He becomes a member of the Redwood Original charter.

Allesandro Montez (Jacob Vargas) is a former member of the Sons of Anarchy Motorcycle Club's Reno, NV chapter.

George "Ratboy" Skogstrom (Niko Nicotera) was originally introduced as a prospect during Season 4. He becomes a patched member and is often entrusted to look after Gemma and the other women.

Taddarius Orwell "T.O." Cross (Michael Beach) is the former president of the Grim Bastards Motorcycle Club. He is voted in as full member of SAMCRO in the series finale, after Jax makes a pact with the other SOA clubs to abolish the unwritten bylaw prohibiting blacks as members, and the Grim Bastards are patched over.

Lenny "The Pimp" Janowitz (Sonny Barger) is convicted of murdering three ATF agents. He is a member of the First 9.

Jackson "Jax" Teller (Charlie Hunnam) was the president of the Sons of Anarchy mother charter from the end of season 4 to the end of season 7. Previously he was vice president under the leadership of his stepfather Clay Morrow. Jax took over as president by force at the end of season 4.

Juan Carlos "Juice" Ortiz (Theo Rossi) was the club's hacker and intelligence officer. He was stabbed and killed by Ron Tully in prison during a riot that Tully (Marilyn Manson) creates.

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Wikipedia