Being stronger than something is NOT the same as being more skillful than something. Especially in a verse like 40k where even basic space marines are CQC and tactical combat geniuses. I'd argue that the average Marine is actually smarter than the average Jedi anyway. I'm going to give some quotes of Marine intelligence just as an example.
-A Marine is able to assess the strengths and weaknesses of 6 enemies in less than a few heart beats
His battle-hardened mind assessed the relative strengths and weakness of the six soldiers without conscious thought: armament, distance, levels of combat effectiveness, routes of attack and escape calculated in less than a few panicked beatings of their hearts.
-Imperial Armor Vol 9 Page 46
-A Traitor Marine is able to analyze an entire battle just by glancing at a scanner
Barsabbas counted the numbers with a cursory auspex sweep. He calculated the readout in his head, subtracting an estimation of noncombatant families and livestock signatures. The total, even with a generous estimate, would be no more than twenty thousand fighters. Twenty thousand men would amount to little more than a speed bump against a well drilled company of Chaos Space Marines.
-Blood Gorgons Page 95
-It takes a nano-second for a Traitor Astartes to process an opponent
The Word Bearer is almost unrecognisable. For a nanosecond, the figure registers to Luciel as an unknown, a threat.
Transhuman responses are already there, unbidden. Adrenaline spikes to heighten an already formidable reaction time. Muscle remembers. Luciel wears his boltgun, an oiled black pit bull of a weapon, in his thigh holster. He can draw, aim and fire in less than a second. The range is six metres, the target unobstructed. There is no chance of missing. Maximus plate, frontally augmented, might stop a mass-reactive shell, so Luciel will fire two and aim for the visor slits. The airgate skin-sleeve is self-repairing, and will survive las-fire damage, but a bolter shot will shred it open, so Luciel also braces for the explosive decompression of a ricochet or a miss-hit. At a simple, subconscious neural urge, boot-sole electromagnets charge to clamp onto the deck plates.
He can make a clean kill headshot in less than a second and a half, two rounds for kill insurance, and probably protect the atmospheric integrity of the airgate.
All this, all this decided, unbidden, instinctive, in less than a nanosecond.
-Dawn Of War Omnibus Page 258
Each of these guys above is utter trash to Kharn.
Most of that Jedi order is full of fodder though also again is Palps more skilled then ALL of them put together or is he just stronger than any one of them? Kharn was considered one of the best amongst his peers even before he had fought constantly for over 10,000 years against a variety of enemies including fighting literal demons in hell. Plus Kharn has fought many enemies that are similar to Sidious (I.e. Psykers) but Sidious has very little if any experience fighting anything like Kharn. And on top of that Sidious had all of his force powers when he was being compared to those Jedi, they are getting negged here. He's going to have to rely on CQC. So yeah just going to go ahead and say that Kharn absolutely flattens Sidious in CQC.
As for your statement about Telekinesis that's already a psyker power in universe that Khorne negs. So you'll have to come up with some explanation as for why Khorne wouldn't neg an exactly identical force power for some reason.