Frankly, I don't think Hollywood can do a decent movie in that department anymore. I like movies like The Rock and Con Air for the short term entertainment they provide, although every time I watch them I can't get rid of the feeling that someone (Simpson/Bruckheimer/Bay) has developed a formula that seems to work for most of the audience and now they kinda cling to it. Especially those two movies seem to have established a couple of key elements that I find at times rather ridiculous. One of the most noticeable things (apart from the annoying Hans Zimmer soundtrack) round the end of the 90s was the introduction of tinkling noises when people fire guns, to simulate the empty shell hitting the ground. Don't know what that is supposed to be, but I think it's meant to show "surgical" action as opposed to war movies of the 50s. Don't know who in here has ever fired a gun, but they'll know you don't hear that kinda **** after the huge bang you get.
Doing an old school gore movie like Predator would totally be out of question for those guys.
That being said, I think that Rodriguez may be someone who could work around that formula and make something a bit more old fashioned, honest and dirty. A bit more analog, if you take my meaning. Only problem with him is that he'll maybe do something that is too much in the style of comics, like Sin City.
In terms of other directors, I'd like to see someone who has experience with action movies, but not in the sci-fi / fantasy department. Like Michael Mann (Heat), or Brian dePalma for instance. Someone who knows how to do a suspense thriller with brains and isn't afraid to provide an ending that is off mainstream. Like Heat, one of my all time faves.