Eyebeam

He's from the original create a character contest in the 80s & he was in the classics mini-comics. I also made Mind Beast & Vizar.

EYEBEAM
Heroic Seeing-eye Guardian 
EyeBeam is the silent member of the Defenders of Trolla. They are the last remaining guardians of Trolla's temple of power after Trolla had been decimated by the Unnamed One's Revenge Squad. When He-Man & Skeletor accidentally teleported to Trolla, he defended the Temple of Power alongside Robotwoman, Netta & JetPak against Skeletor's Revenge Squad.
Eyebeam acts as lookout & guides the way for He-Man using his powerful macroscopic & microscopic vision. Even though his enormous Eye can only look in 1 direction, Eyebeam was brought back from the future by the Mighty Spector when Mekaneck vanished during the Spell of Separation.

Mind Beast

Mind Beast appeared in the old MOTU Star Comics. I also made Lt. Andra, Cosmic Comet, & He-Sol.

Evil Fear Vampire

During an attack by Blade & Saurod, Man-at-Arms was injured by Saurod's new sparks. Teela & Adam flew in the Wind Raider to Helios above the Sands of Time to get the Healing Gem of Helios, placed there by the Cosmic Enforcers for safe keeping.

In order to get the Healing Gem & save Man-at-Arms, Teela had to face the Mind Beast in the Maze of Madness. But she was incapacitated by the Mind Beast's power to make people see their greatest fear.

When The Mind Beast was defeated by He-Man, he left Helios & searched for his creator, Shokoti. Instead, he was found by Scareglow who felt the Mind Beast's fear energy & brought him back to Snake Mountain to serve as one of Skeletor's Evil Warriors, feeding on the fear of others.

Cosmic Comet

The comet creatures are sort of obscure. I also made Gavage-or & Melog.

COSMIC COMET
Heroic Comet Creature
Zagraz controlled all the comets but when he tried to control twin comets he used too much magic, destroying one. The remaining Cosmic Comet grew lonely & angry which allowed Skeletor to use his own evil magic over it. Skeletor had the Cosmic Comet create Comet Creatures to fight He-Man.
He-Man was able to reduce the evil Comet Creatures to rubble. The Sorceress & Zagraz used pieces of the creatures at Castle Grayskull to create a new partner comet.
The Cosmic Comet, in gratitude, created a Cosmic Comet Creature to help He-Man prevent Skeletor from controlling other comets.

Gavage-or

This obscure guy appeared in the 2012 comic He-Man & The Masters of the Universe #3 I also made Lion-or, the Galactic Guard, Jailor the Grayskull Guards & Torturor

Gavage-or
Evil Hostage Keeper
On another Eternia Skeletor stole the memories of He-Man & all the other Masters of the Universe, while his Evil Warriors toyed with the amnesiac heroes all across Eternia. Skeletor took over Castle Grayskull now that He-Man did not have his sword & could not prevent the invasion.
When skeletor sought the source of The Power Sword's power, he held The Sorceress hostage in Castle Grayskull. She went on a hunger strike but Skeletor had Gavage-or force feed The Sorceress multiple times.
Gavage-or was recruited by Jailor from one of the many villages under Skeletor's control in the Dark Hemisphere. He works closely with Karg to make sure prisoners stay alive long enough to be tortured.

Lion-or

 Another obscure character from the 1987 She-Ra Annual. He doesn't have an official name. I also made Snarrl, Captain Tibbar & the Cat Soldier.

LION-OR
Heroic Lion Warrior
In a distant corner of Etheria, far from Crystal Castle, Adora was searching for mystical gems in a lake when SwiftWind heard the sounds of Lion-or being attacked by a Terrordactyl. After being rescued by She-Ra, Lion-or told her about his peaceful tribe of river dwellers who were protected by the Gong of Leona, a magical instrument that cloaked his people in invisibility. 
Hordak stole the gong to force the Lion Men to join the Horde but they refused so Hordak released a robot monster as punishment. She-Ra defeated it & after Lion-or found the gong, he joined the Great Rebellion in their fight against the Horde.