Ahahaha Mission Trance is definitely NOT high quality. By any means. And it only starts getting decent a chapter or two before it died. So I'm just gonna save you the trouble and tell you it's not worth reading. XD It just has a special place in my heart cuz it was my favorite online comic through all of middle school.
Grayling is... interesting. I didn't actually finish reading it (it is complete, not dead), but I got very very close to the end before I fell behind. I have no idea how I found it, but I saw the art and just had to read it. It's just so bizarre, and it got weirder and weirder as the comic went on. *.* It's also hella long. The characters are awesome, the plot is way beyond complicated, and the time line jumps around a lot, so I have no summary for you. I would definitely recommend it, though I can't say whether or not you'll actually like it since I'm not even sure why I was so addicted to it.
Can I be any more vague and unhelpful? I'm not sure I could. /fail
Daisuke isn't really that simple compared to TK, so really your only potentially simple one is Naoto. Except it's still not simple for some reason. XD I've come to believe that there is no such thing as a decent-looking simple cosplay. Except for Metis and Charles.