All else being equal a longer rod is going to get more distance. 8 foot seems to be about the longest for bass fishing, and not many of them around....far as I know. I don't Salmon/Steelhead fish, but it is my impression that a 9' rod is a short rod for that type of fishing.
It is also my opinion that a rod with a nice parabolic bend is going to give you the longest distance. At least it does for me. Of the rods I own, I would say my Falcons give me the greatest distance with lures in that range. Both the Expert and the Cara (not T7) do quite well. Both have what appears to me to be moderate actions.
If I were looking for a long distance BASS rod for that weight range, I would be looking at a rod in the 7'6" length (or thereabouts) in medium power and moderate action. This rod should load well. Problem is that although I often throw for the moon, I've never tried testing my gear to see which combination would throw the furthest.
However, I can tell you that my Curado 51E on a 6'6" Falcon Expert Medium will throw a 3/16 oz. spinnerbait further than my Alphas ito/Zillion 6'6" Medium Extra Fast will. Both reels have 8 lb. mono on them. My personal opinion is that it is the rod, not the reel, that determines best distance for these two combos. Of course I will have to switch reels/rods to know for sure.
Now that I usually fish from a boat, I am not as concerned about distance as I was when stuck on shore. I will say that I think it is funny that shore bound fishermen are often trying to throw their lure to the other shore, while the first thing they do when they get in a boat is head for the shoreline and cast up next to it. I'm as guilty as the next person. I'm looking for cover and weed lines. Where are they? Along the shore, of course!
EDIT: Oops. Just noticed that your weight range isn't for 3/16-1/2 like I was thinking, but 3/16-1 oz. That changes things. A medium power is going to be out of the question. Most don't go above 5/8 oz. Several of my mediums have an upper rating of 1/2 oz. Now you are talking a MH rod rated for 1/4-1 oz. lures. Doubtful it will give you the best distance at both ends of the spectrum, but would be a good compromise if all you want is one rod to do it all. If you insist on maximum distance for 3/16 and 1 oz., then I think you are going to need 2 rods.
My Zillion 50th Anniversary with 12 lb. mono and Zillion Flip and Pitch rod (a 7'6" Heavy) will throw a 3/4 oz. spinnerbait far enough that it might give me some trouble setting the hook.
My experience is very limited compared to most of the guys on here which is why I am not listing makes and models for you to buy, but only mentioning what I have. I can tell you that my TD-Z 103HL Type R on that same Zillion Flip and Pitch rod will also launch a frog a long ways. It is loaded with 55 lb. braid.