I really don't agree with how Marc is the Traveller and Jake is the Embracer as stated in the comics. I see it as the reverse, where Jake is the Traveller and Marc is the Embracer.
Why? Marc started taking in Reese to work for him, then Soldier, then talked to 8-ball. He "embraced" them, like Marc is trying to emulate what he thinks Khonshu should be. A "guiding figure" who embraces the lost. And those who he embraces stay with him. Embracing him in return.
Literally, there is a scene where Marc hugs Reese, Tigra hugs Marc. Actual Embracing. That should have been very obvious.
AND the fact that Reese, Soldier and maybe 8-balll then embraces the image of Mr. Knight. The same way Marc embraces the role of the "Khonshu" for the Midnight Mission.
Everything about him is Embracing, metaphorically and literally.
Metaphorically since by Embracing others, Marc can also stop feeling lonely. There is comfort in embracing, and Marc is shown to do it to comfort others. Though it is also a way for him to comfort himself as deep down, he craves others to stay with him. Especially since most of his old friends and allies left. And Khonshu is in jail.
Marc is a sad lonely man who wants to embrace and be embraced. And don't want to let go. Even the people he recruited into the Midnight Mission was influenced by this inability to let go. They embraced him and won't let him go.
Sure they saw Marc die (this will change as usual), but they still didn't let him go. They won't let go of this image of Marc, the same way Marc won't let go of the mantle of being Moon Knight.
Which isn't exactly healthy because it is already bordering or is co-dependence.
Edit: Really, He is starting his own cult. And he may not realize it, but he is being seen as a type of god to them. A Personality Cult that worships him. Not Khonshu, him as the "god". A Jesus/Messiah figure in some twisted parody of Monotheism. Because if you are really devoted to someone as savior-figure, you turn it to a religion.
And Jake is a Cab driver, it is his job to travel and not be stationary. He keeps moving, he keeps travelling around New York. So Jake should be the Traveller purely because of the nature of what he does. Sure he helps them, but he also doesn't overly attach them to him. He comes and goes when and how he likes. Like the wind that keeps moving at it's own pace and helping the people he meets. Regardless of their class status. And most of them are the lower class that are left behind in society.
By not being overly attached, Jake can keep on moving and not confine himself to a single spot. Like some travelling sage or something who refuses to stay put.
There is freedom in travelling and Jake, with whatever little time he is allowed when he fronts. He doesn't have much time since Marc is pretty much tend to monopolize the body. Jake may feel imprisoned, since he pretty much is, so the moment he is travelling in his cab, he relishes every second of it.
Jake just wants the freedom to be himself and help others with it by his own accord.
That and Marc is pretty much limited to a place in New York. He is confined and can't travel outside of the city without alerting the Avengers. He doesn't travel, other's travel to him. Which is the opposite of what travelling is supposed to be.
Marc has to wait for the people to come to him. He waits. He should be called the Waiter, not the Traveller.
It isn't Marc, but Jake who embodies the concept of the Traveller, both literally, and metaphorically.