No, Dwight doesn't kill Daryl in the comics.
In The Walking Dead comics, Dwight kills several antagonists. One of them is Simon, who was a threat to the group. Also, his actions against other enemies contribute to the overall story arc.
The fate of Dwight in comics varies. It often depends on the plot and the creative direction of the specific comic. Sometimes he survives through various challenges, but in other storylines, his fate could be different.
Daryl indeed doesn't exist in the comics. The TV show introduced this character specifically for its storyline.
It's hard to give a straightforward yes or no. Dwight's character has moments where he does good things, but also has flaws and makes questionable choices that complicate his goodness.
To know what happens to Dwight in the comics, you'd have to look at the context and plot of that particular comic. Sometimes he might have a heroic journey, or perhaps he encounters unexpected villains.
Daryl wasn't gay in the comics. The creators didn't develop that aspect of his character. His story mainly revolved around action and challenges in the comic world.
Maybe the creators of the comics just didn't envision his character in that particular story universe.
No, Daryl isn't dead in the comics. He's still going strong and playing a significant role.