Question: Who did Fatih Kocamis train alongside that has a title in both MMA and K-1 kickboxing?

Context paragraphs:
Jean Rivière: Jean Rivière (born July 2, 1971) is a Canadian former Kyokushin karateka, kickboxer and mixed martial artist.  A heavyweight competitor fighting out of Montreal, Rivière reached the semi-finals at the 5th Kyokushin World Open in 1991 and later embarked on a career in the K-1 kickboxing promotion and the burgeoning MMA scene of the mid-1990s.

Hero's: Hero's was a Japanese mixed martial arts promotion operated by Fighting and Entertainment Group, the parent entity behind kickboxing organization K-1.  Grown from and branched off of K-1's earlier experiments in MMA, including the "K-1 Romanex" event and various MMA fights on its regular K-1 kickboxing cards, it held its first show on March 26, 2005.  The promotion was handled by former Rings head Akira Maeda.  At a press conference on February 13, 2008, FEG announced that they discontinued Hero's and were creating a new mixed martial arts franchise, Dream, in collaboration with former Pride FC executives from Dream Stage Entertainment.

Ian Schaffa: Ian James Schaffa (born as "Ian James Schaffer" on 23 January 1978) is an Australian professional mixed martial artist, kickboxer and boxer.  He has fought for XFC, K-1, S-Cup, World Victory Road, and Shooto promotions.  Schaffa is most notable for his intense bout with UFC fighter Kid Yamamoto and holds a notable K-1 kickboxing KO win over Japanese superstar Genki Sudo and Japanese kickboxing champion Keiji Ozaki.

DRG Class 61: The two German DRG Class 61 steam engines were express train locomotives specifically built by Henschel for the Henschel-Wegmann train in service with the Deutsche Reichsbahn.  The Henschel-Wegmann train was an initiative of the German locomotive construction industry, intended to be able to demonstrate a powerful locomotive-hauled train alongside the emerging express railbuses.

K-1 PREMIUM 2004 Dynamite!!: K-1 PREMIUM 2004 Dynamite!!  was an annual kickboxing and mixed martial arts event held by K-1 on New Year's Eve, Friday, December 31, 2004 at the Osaka Dome in Osaka, Japan.  It featured 7 K-1 MMA rules fights, 3 K-1 rules fights, and a special mixed K-1 & MMA Rules fight.

Alistair Overeem: Alistair Cees Overeem (] , ; born 17 May 1980) is a Dutch mixed martial artist and former kickboxer.  He is a former Strikeforce Heavyweight Champion, DREAM Interim Heavyweight Champion, K-1 World Grand Prix Champion, and is one of only two fighters to hold world titles in both MMA and K-1 kickboxing at the same time.

Dynamite!! USA: SoftBank presents Dynamite!!  USA was a mixed martial arts (MMA) event co-promoted by FEG, the promoters of K-1 kickboxing and Hero's MMA events, and EliteXC.  The event was held on Saturday, June 2, 2007 at the Los Angeles Memorial Coliseum in Los Angeles, California.

K-1 World MAX 2004 World Tournament Final: K-1 World MAX 2004 World Tournament Final was a kickboxing and martial arts event promoted by the K-1 organization.  It was the third K-1 MAX final for middleweight kickboxers (70 kg/154 lb weight class) involving eight finalists and two reserve fighters, with all bouts fought under K-1 rules.  Seven of the eight finalists had won elimination fights at the K-1 World MAX 2004 World Tournament Open, while the last finalist and both reserve fighters were invited despite suffering defeats.  As well as tournament matches there was also an opening fight, fought under K-1 rules and a super fight fought under K-1 mixed rules (2 rounds of kickboxing, 2 rounds of MMA).  In total there were fourteen fighters at the event, representing nine countries.

Art Davie: Art Davie is a business executive and entrepreneur formerly active in Southern California advertising circles.  In 1993, he created and co-produced the tournament which became the televised Ultimate Fighting Championship.  In 1998, Davie, as vice-president of K-1 USA, brought the successful K-1 kickboxing franchise from Japan to Las Vegas and North American pay-per-view television.  In 2003, Davie was an executive producer with Mandalay Sports Entertainment.  In 2006, he became vice-president of television at Paradigm Entertainment Group.  In 2014, Ascend Books published Davie's book, "Is This Legal? : The Inside Story of the First UFC from the Man Who Created It".  Sean Wheelock assisted in the book's research and writing.  In November 2014, Davie was inducted into the Legends of MMA Hall of Fame, alongside Big John McCarthy, Pat Miletich, Fedor Emelianenko, and Rickson Gracie.

Fatih Kocamis: Fatih Kocamis (Turkish "Fatih Kocamış") is a German/Turkish retired mixed martial artist and kickboxer who fought in Pride Fighting Championships, RINGS, K-1 and M-1 Global.  He trained with the Golden Glory team, alongside Chalid Arrab, Stefan Leko and Alistair Overeem.

Supporting paragraphs: Fatih Kocamis Alistair Overeem
Answer: Alistair Overeem