I'd say warrior, or paladin. Rogue is surprisingly poor at combat and archery, and has only 15 sided HD. Paladin has Detect Evil, and Detect Animal* rods are easy to come by. Going without detection is a huge pain for certain bosses (Dunlending agent, Azog, Ferny.) I don't know if Azog is even possible without at least detect evil. He runs far and fast.
My recommendation is to make it an open competition.

* There are tons of nasty critters it's best to avoid.

Yeah rogue is a fair bit weaker than in vanilla. The hit dice go up with size & I get the impression race makes a big difference to accuracy. I might try out a half-orc rogue & see if it melees any better.

Next Comp
 

Well, before we think about what race/class combo should be played we should probably think about what the point of this particular comp is.

Just showing off the game in general? Specifically showing off the innovative ideas (such as the new and interesting magic spells) in it? Something else?

Race does make a pretty noticable difference; I know that I've had a much easier time surviving as a dunadan rogue than I have as a man of Dale one.

My suggestion is to hold off for 0.7, when a few glaring balance issues are solved. 0.6.5 was intended as a bug fix release. Any comp now would be reporting a bunch of really obvious problems. Wait until those are fixed, then a comp would actually provide useful feedback.

Sorry folks. Things are a little crazy right now. Will have a comp up sometime in the next week or two.

Suggestion for future PosChengband compo: Consider an Archon Force-Trainer? Any thoughts?

So comp suggestion quick - poschengband iron man high elf ranger. Nature/sorcery easy id&lore, reduced uniques.

Sorry for the delay here, folks. I'll have something up soon.

@all: So, this may be a bit of a weird request... but I'd like to see the top players here try a ToME 2.x (-AH) bard. Yes, bard. (Even if it's the original T2 2.3.4, that'll probably be OK, I haven't changed much wrt. "balance".)

I'm asking purely because it's been known as a ridiculouslty hard class, but I'm seriously considering removing it because it actually takes quite a lot of "if-then-else" code to support. (I think the general conduct for this would be: Only Music-style magic, e.g. no Mindcraft, etc.)

For a *real* challenge, this should be at least a LostSoul Bard for shits and giggles :D