There were many contributors to the Tales series of games, but rather few of them sticked to this job. Many of them have a Wolfteam or Telenet Japan background (note that unless noted otherwise I call those a "former employee" who worked for Telenet Japan before the release of ToP or for Wolfteam before the restructuring in late 1993/early 1994). Also notable is Cybernetic Empire which is the last non-Tales game of the regular Tales staff.
For now the focus is on the Wolfteam/Tales Studio development staffs, not the Namco side or any of the plenty other sidegames. Among the games considered as main Tales games, Tales of Legendia is not by Tales Studio but by Namco itself it's not considered here (the only notable Legendia staff involved with earlier Tales games are Namco producer Jun Toyoda (豊田淳) and Namco director Yuichiro Sadahiro (貞弘雄一郎)). Another one is Tales of the Tempest by Dimps, which only employed Tales Studio's sound staff.
Eiji Kikuchi (菊池栄二) Former Telenet employee who worked there as graphician and director since the late 1980s. Director of all Tales games except the Narikiri Dungeon one. Manager/coordinator of the development department.
Motoi Sakuraba (桜庭統) Former Wolfteam employee. Composed new music and engineered sound for all games except Narikiri Dungeon. Freelancing.
Shinji Tamura (田村信二) Former Wolfteam employee. Composed new music for all games except Narikiri Dungeon and Tempest. Member of » Onion Brothers, used to be part time employed by Tales Studio.
Yasuyuki Sawadaishi (沢田石靖之) Former Wolfteam employee. Graphic artist who worked on all 2D Tales games (which excludes Symphonia and Abyss). Starting with Destiny he was assuming the overall graphic direction.
Keiichi Goto (後藤恵一) Former Telenet employee. Graphic artist who did most of the battle character/monster graphic design between Destiny and Rebirth, may have been involved with Tales of Eternia Online. Redid the battle character graphics for Phantasia PSP.
Kazuya Ishizuka (石塚和也) Former Wolfteam employee. Did scenario for Destiny, game design/planning for Phantasia PSX, Narikiri Dungeon, Destiny 2, Rebirth and Destiny PS2.
Ryuichi Ishizawa (石沢隆一) Former Wolfteam programmer. Support programmer for Destiny, system programmer for Phantasia PSX, Narikiri Dungeon, Destiny 2, Rebirth, Phantasia PSP and Destiny PS2.
Hiroyuki Suzuki (鈴木宏之) Former Wolfteam employee. Game design for Destiny, Phantasia PSX and Eternia, script editing for Destiny 2, Symphonia, Rebirth and Destiny PS2.
You Ohtsuka (大塚裕) Former Wolfteam employee. Program support for Eternia, system programmer for Symphonia and Abyss.
Yuji Kanbara (神原雄二) Former Wolfteam employee. Graphic artist who did graphic design for Phantasia SFC, Eternia and Destiny 2 and Rebirth, as well as event direction for Destiny PS2.
Hirofumi Matsuo (松尾博史) Former Wolfteam employee. Graphic artist who did monster graphic design for Destiny, Eternia, Destiny 2, Rebirth and Destiny PS2.
Yoshiharu Gotanda (五反田義治) Former Wolfteam programmer, wrote the story to and programmed most of Phantasia SFC. Left and founded tri-Ace during development due disput with publisher Namco.
Hiroya Hatsushiba (初芝弘也) Former Wolfteam sound programmer, did sound programming for Phantasia SFC, joined tri-Ace and founded tri-Crescendo.
Masaki Norimoto (則本真樹) Former Wolfteam employee, did game design for Phantasia SFC, co-founded tri-Ace.
Shigeru Ueki (植木茂) Former Telenet employee, completed programming of Phantasia SFC, joined tri-Ace afterward.
Hiroshi Ogawa (小川浩) Former Wolfteam employee, did game design for Destiny, now works for tri-Ace.
Shinji Hirachi aka S.H.I (平地慎二) Former Wolfteam programmer, did battle program for Destiny and Phantasia PSX, now works for tri-Ace.
Shuhei Rokumoto (六本周平) Former Wolfteam programmer, did 3D field program for Phantasia PSX, now works for tri-Crescendo.
Kenichi Suzuki (鈴木健一) Former Wolfteam graphic designer, director and scrip writer. Did graphics in Destiny, game design in Phantasia PSX, direction in Narikiri Dungeon and script writing for Destiny 2, disappeared with the creation of Tales Studio.
Katsutoshi Sato (佐藤勝利) Former Telenet employee. Did system program for Destiny and Eternia, field program for Symphonia.
Tatsuro Udo (有働龍郎) New staff for Phantasia PSX as 2D field programmer, then battle programmer for Eternia, Destiny 2, Rebirth and Destiny PS2.
Atsushi Horiguchi (堀口篤志) New staff for Phantasia PSX as voice data editor, sound effect editor for all Tales games except Symphonia since.
Takashi Hasegawa (長谷川崇) New staff member as game designer/planner for Eternia, assumed the same job for Symphonia and Abyss.
Toshihiro Kimura (木村敏浩) New staff for Narikiri Dungeon as programmer, then did 2D map program for Destiny 2 and Rebirth, field graphic program for Destiny PS2.
Takehito Nagasawa (長沢岳仁) New staff for Eternia as support programmer, then did field program for Destiny 2, Rebirth and Destiny PS2, as well as script editing for Symphonia
Shuji Ikegami (池上修司) New staff for Destiny 2 and sound programmer since, except voice over editing for Symphonia and sound direction for Tempest.
Yoshimasa Tanaka (田中成昌) New staff for Destiny 2, did battle program support for that, Rebirth and Destiny PS2, program support for Symphonia.
Toyokazu Endo (遠藤豊和) New staff for Eternia as support programmer, then did menu program for Destiny 2, support program and script editing for Symphonia, and again menu program for Rebirth. Possibly left again.