Depends on which Thor we're talking about. Classic Thor loses badly. I doubt he could hurt Runner with physical force. Godblast would be too risky: If it doesn't work Thor's definitely dead. Mystic Lightning wouldn't hurt him. All the while Runner's giving Thor hundreds of 100 ton punches a second. The best he could do against Runner is BFR, from which he'd just run back to the fight.
King Thor wins a slight majority, 6 or 7/10. With Odinforce he could banish him to a dimension from which he couldn't return by conventional means (Negative Zone maybe). RKT Thor traps him life-force in a bottle and makes him a genie.
Runner is one of the more powerful Elders of the Universe, a few of which I suspect are skyfather level or higher. The fact that it takes a Thanos level being to defeat him speaks volumes. To quote J'onn J'onzz "There's a reason he's the last survivor of his race." They just don't appear often enuff to have feats that demand respect.
I so just wanted to say "Runner, duh"...Feeling quite lazy today.
__________________ I'd like to share a revelation that I've had during my time here. It came to me when I tried to classify your species that I realized you aren't actually mammals. Every mammal on this planet instinctively develops a natural equilibrium with its surrounding environment, but you humans do not. You move to an area and you multiply, and multiply until every natural resource is consumed. And the only way you can survive is to spread to another area. There is another organism on this planet that follows the same pattern. Do you know what it is? A virus. Human beings are a disease, a cancer of this planet. You are a plague, and we...are the cure.
The Runner nearly killed Silver Surfer, The Runner is above Thor and Silver Surfer. If Silver Surfer couldn't beat him Thor won't have a shot either, King Thor would win the majority, but Rune King Thir will literally beat the sh** out of the Runner. Warrior Madness Thor doesn't have the speed to battle The Runner, he is one of the few beings that can beat the Champion of the Universe and it won't be no PIS at all.
The runner is more powerful the Silver Surfer, as where Silver Surfer=Thor<<< The Runner w/powers of Primodial. The runner rus at warp-speed, vast superhuman strength, energy projection, agility, indestrcuitable, plus he will make you like him. The Runner 10/10