Just working on a list of the G1 Series Voice Actors and this is what I have so far.
Can anyone check for errors/omissions please and thanks!

Aaron: Linda Gary
Abdul Benfizel: Roger Carmel
Abdul Fakkadi: Philip L. Clarke
Abominus: Jim Gosa
Afterburner: Jim Cummings
Agar: Ron Feinberg
Air Raid: Rob Paulsen
Alpha Trion: John Stephenson
Announcer, ep. 'Trans-Europe Express': Jack Angel
Apeface: Dick Gautier
Arcana: Jack Angel
Arcee: Susan Blu
Astrotrain: Jack Angel
Auggie Canay: Philip L. Clarke
Beachcomber: Alan Oppenheimer
Blades: Frank Welker
Blast Off: Milt Jamin
Blaster: Buster Jones
Blitzwing: Ed Gilbert
Blot: Tony St. Jame
Bluestreak: Casey Kasem
Blurr: John Moschitta Jr
Bombshell: Michael Bell
Bonecrusher: Neil Ross
Brainstorm: Michael Bell
Brawl: Tony St. James
Brawn: Corey Burton
Breakdown: Jack Angel
Broadside: Bill E. Martin
Bruticus: Roger C. Carmel
Bumblebee: Dan Gilvezan
Buzzsaw: Frank Welker
Caliburst: Johnny Haymer
Carly: Arelene Banas
Cerebros: Jered Barclay
Chip Chase: Michael Horton
Chromedome: Frank Welker
Chromia: Linda Gary
Cliffjumper: Casey Kasem
Computron: Brent Kramer
Cosmos: Michael McConnohie
Cutthroat: Tony St. James
Cyclonus: Jack Angel
Dancitron Promoter: Wally Burr
Daniel: David Mendenhall
Dead End: Philip L. Clarke
Decepti-Traan: Paul Eiding
Defcon: John Stephenson
Defensor: Chris Latta
Devastator: Arthur Burghardt
Dirge: BJ Davis
Dirk Mannis: Charlie Adler
Divebomb: Laurie Faso
Dr. Arkeville: Casey Kasem
Dr. Fuji Yoshikawa: Walker Edmiston
Dr. Fujiyama: Michael Bell
Dr. Gregory Swafford: Jered Barclay
Drag Strip: Ron Gans
Duros: Charlie Adler
Dutch: Jack Angel
Elita One: Marlene Aragon
Firebolt: Dick Gautier
Fireflight: Jeff MacKay
Firestar: Morgan Lofting
First Aid: Michael Bell
Former Autobot Leader: Peter Cullen
Fortress Maximus: Stephen Keener
Frenzy: Frank Welker
Galvatron: Frank Welker
Gears: Don Messick
Goldbug: Dan Gilvezan
Gort: Michael Bell
Grapple: Peter Renaday
Grimlock: Gregg Berger
Groove: Frank Welker
Hardhead: Stephen Keener
Headstrong: Ron Feinberg
Highbrow: Johnny Haymer
Hoist: Michael Chain
Hook: Neil Ross
Hot Rod: Dick Gautier
Hot Spot: Dan Gilvezan
Hound: Ken Sansom
Huffer: John Stephenson
Hun-Grrr: Marshall Efron
Inferno: Walker Edmiston
Ironhide: Peter Cullen
Jero: Ed Gilbert
Jessica Morgan: Joy Grdnic
Joe: Peter Cullen
Karen Fishhook: Susan Blu
Kickback: Clive Revill
King Nergil: Wally Burr
Krunk: Chris Latta
Kup: John Stephenson
Laserbeak: Frank Welker
Lightspeed: Danny Mann
Long Haul: Gregg Berger
Lord Gyconi: Paul Eiding
Luisa: Mona Marshall
Mara Al-Utha: Corey Burton
Marissa Faireborn: Susan Blu
Megatron: Frank Welker
Menasor: Regis Cordic
Metroplex: BJ Davis
Michelle: Susan Blu
Mindwipe: Stephen Keener
Mirage: Frank Welker
Mixmaster: Frank Welker
Moonracer: Morgan Lofting
Motormaster: Roger C. Carmel
Mr. Robbins: Dan Gilvezan
Nightstick: Peter Cullen
Nosecone: David Workman
Octane: Beau Weaver
Old Snake: Chris Latta
Omega Supreme: Jack Angel
Onslaught: Steve Bulen
Optimus Prime: Peter Cullen
Orion Pax: Laurie Faso
Outback: Gregg Berger, Aron Kincaid
Peacemaker: Steve Bulen
Perceptor: Paul Eiding
Pipes: Hal Rayle
Pounce: Stan Jones
Powerglide: Michael Chain
Predaking: BJ Davis
Primacron's Assistant: Gregg Berger
Princess: Linda Gary
Private Dickson: Laurie Faso
Professor Terranova: Jack Angel
Prowl: Michael Bell
Punch-Counterpunch: John Moschitta Jr.
Quintesson Judge: Regis Cordic
Quintesson narrator: Paul Eiding
Ramjet: Jack Angel
Rampage: Laurie Faso
Ratbat: Frank Welker
Ratchet: Don Messick (sometimes Wally Burr)
Ravage: Frank Welker
Recoil: Johnny Haymer
Record Keeper Droid: Corey Burton
Red Alert: Michael Chain
Red Wizard: Corey Burton
Reflector: Chris Latta
Rippersnapper: Jim Cummings
Rodimus Prime: Dick Gautier
Roland: Johnny Haymer
Rollbar: Dan Gilvezan
Rumble: Frank Welker
Runabout: Roger Behr
Runamuck: Roger Behr
Sandstorm: Jerry Houser
Scavenger: Don Messick
Scorponok: Stephen Keener
Scourge: Stan Jones
Scrapper: Michael Bell
Searchlight: Steve Bulen
Seaspray: Alan Oppenheimer
Security Guard: Dan Gilvezan
Sentinels: Gregg Berger
Shawn: Ed Gilbert
Shockwave: Corey Burton
Shrapnel: Hal Rayle (or Wally Burr)
Sideswipe: Michael Bell
Silverbolt: Charlie Adler
Sinnertwin: Jered Barclay
Six-Gun: Maurice LaMarche
Sixshot: Neil Ross
Skids: Dan Gilvezan
Sky Lynx: Aron Kincaid
Skydive: Laurie Faso
Skyfire: Gregg Berger
Skywarp: Frank Welker
Slag: Neil Ross
Slingshot: Rob Paulsen
Sludge: Frank Welker
Slugslinger: Peter Cullen
Smokescreen: Jack Angel
Snake: Chris Latta
Snarl: Hal Rayle
Soundwave: Frank Welker
Sparkplug: Chris Latta
Spike: Corey Burton
Starscream: Chris Latta
Strafe: Steve Bulen
Streetwise: Peter Cullen
Sunstreaker: Corey Burton
Superion: Frank Welker, Ed Gilbert
Sureshot: Steve Bulen
Swerve: Ted Schwartz
Swindle: Johnny Haymer
Swoop: Michael Bell
Tailgate: Ted Schwartz
Tantrum: Philip L. Clarke
Teletran I: Casey Kasem
Thrust: Ed Gilbert
Thundercracker: John Stephenson (or Wally Burr)
Tracks: Michael McConnohie
Trailbreaker: Frank Welker
Triggerhappy: Charlie Adler
Trypticon: Brad Garrett
Ultra Magnus: Jack Angel
Unicron: Roger C. Carmel
Vector Sigma: Corey Burton
Vorath: Charlie Adler
Vortex: Johnny Haymer
Warpath: Alan Oppenheimer
Weirdwolf: Stan Jones
Wheeljack: Chris Latta
Wideload: Corey Burton
Wildrider: Terry McGovern
Windcharger: John Stephenson
Wingspan: Peter Cullen
Witch: Linda Gary
Wreck-Gar: Tony Pope
Additional voices: Roger C. Carmel, Victor Caroli, Michael Chain, Stephen Keener, Morgan Lofting, Alan Oppenheimer, Ken Samson