Back on to the prime topic of suits without ties, I will make a horrifying confession and say that I have worn a dinner suit without any form of neckwear on several occasions. The shirt I wore was a dark red and heavily textured. I wore this particular outfit to go out to casual dinners with friends a few times (I'd never do it to anything actually black tie).
I'm not averse to the look you were trying to convey but agree with you that it should be done with a lounge suit rather than a dinner jacket. In the last year I've grown quite fond of patterned shirts, which I find don't go well with ties but can be made to work with a dark suit for a dressed up casual look.
Or to put my views on this whole topic another way: I really like wearing suits and tailored jackets. It would be a shame to only be able to wear them on occasions when I want to wear a tie. As fond as I am of ties, I don't feel that a suit has to be reliant on one to look good.