Tulak Hord vs Yoda
Here's some info on Tulak.
"In his time as Dark Lord of the Sith, Tulak Hord was known as a master of the mystical dark arts of the Force, using his powers to plumb the depths of life and death. In the battles of Yn and Chabosh, Tulak Hord is believed to have used a ritual to draw the strength of his enemies to himself, growing his power and vitality. One ritual of Tulak Hord's gets only a scant mention in the histories, but is the subject of myth and legend–a ritual rumoured to grant eternal life. No one has ever managed to uncover this mythical ritual, let alone perform it." - SW:ToR, Codex Entry, The Ritual of Tulak Hord (Sith Inquisitor).
Three hundred years after Tulak Hord, the Sith Ergast tried to recreate the ritual the Dark Lord used to devour the spirits of his enemies at Yn and Chabosh. In its place, he discovered what he called the ritual of Force-walking. Requiring a Sith of great strength of will, the ritual of Force-walking allows the user to bind the restless ghosts of dead Sith to himself. Once the ghosts are bound, the ritualist may draw from their power, channeling it into a powerful exertion of Force energy against his enemies." - SW:ToR, Codex Entry, Force-Walking (Sith Inquisitor)
"Lord of Hate, Master of the Gathering Darkness and Dark Lord of the Sith. These are but a few of the titles worn by the great Tulak Hord. His command of the dark side and mastery of lightsaber techniques won Hord many battles, and each victory earned him enemies abroad and within the Sith ranks. Of the many who challenged his might, none were successful. Imperial historians believe the worlds conquered by Hord number in the hundreds, but any records from his bygone era were lost in the Great Hyperspace War." - SW:ToR, Codex Entry, Tomb of Tulak Hord.
"Incidents of Sith Lords imbuing their most precious possessions with some fragment of their dark power appear throughout Sith history. Such ritual imbuement can be used to inflict all manner of trouble on those who would steal these terrible treasures. The Dark Lord of the Sith Tulak Hord was especially known for this practice, and many possessions of Tulak Hord's have driven their discoverers to madness throughout the years. Tulak's Madness is unique in who it affects, however; ignoring whether a person's spirit is dark or light, it afflicts only the weak-willed, driving them to delusions of grandeur and eventual self-destruction." - SW:ToR, Codex Entry, Tulak Hord's Madness.
And of course, there is Hord's friendly servant Khem Val, whose feats are:
"Powerful, cunning and ruthless enough to slay even the strongest Force users, Khem Val was trained as an elite assassin. After emerging from his long slumber, the Dashade is the very embodiment of death and destruction; a reminder that there are things even Sith and Jedi must fear."- SW:ToR, Codex Entry, Khem Val (Sith Inquisitor)
"Under Tulak Hords command, Khem Val devoured the life energy from thousands of Jedi in ancient battles waged on the planets of Yn and Chabosh. One of Khem Val's proudest victories came during the Battle of Chabosh, where he fought by Tulak Hords side to conquer an army of Jedi 1,000 strong." - SWTORE.
Also even in his early days, Tulak beat Khem easily.
"This was the tomb of Tulak Hord, the greatest lightsaber duelist of the Sith Lords. His skill was considered remarkable even for his time, when many true lightsaber masters lived. If you were to face an ancient Sith Lord in combat, you would learn that we are as children playing with toys compared to the prowess of the old masters." - Kreia, KotOR.
"The great Tulak Hord once pulled a ship this size from the sky." - Khem Val, SW:TOR, upon seeing the ruins of the Endar Spire.
"I have not felt this full since the battles of Yn and Chabosh, when Veshik Urk and I followed our masters into war and feasted upon armies of Jedi. It was in the days before Tulak Hord was the Dark Lord of the Sith. On Yn, the Jedi had laid siege to an imperial stronghold. Tulak Hord broke the siege singlehandedly. And then he pressed forward to Jedi-held Chabosh, leaving nothing but Jedi blood in his wake. I never lacked Force energy to feed on in those days." - Khem Val, SW:TOR.
"Tulak Hord-a mighty Sith Lord with legendary lightsaber skills." - SWTORE.
"The secrets behind Tulak Hord's great power were many, and they all but vanished from the galaxy with the Dark Lord's death. Generations of Sith have obsessed over unearthing his ancient teachings and artifacts, but Tulak Hord hid them well."
―Star Wars The Old Republic Codex Entry
"Lord of Hate, conqueror of the planets Yn and Chabosh, and master of Sith Sorcey..."
―Star Wars The Old Republic Encyclopedia