Forest Dweller, now have been thinking on how to reply to your question. Now am sorry but I cannot rank that list from the most incredible to the least. Now every place has it's own rewards and things that it offers. All these places are actually all part of the same area, the Southern Absaroka Wildland Area. And there are places that you didn't mention right in the same area also. It is all wilderness. The thing is not to get into an area and rush thru it. But going back into these wild areas with taking your time and really seeing it all. And also along with really living back in here till it becomes a part of you, with you thinking of it as your home. Every place has something to offer. Now everyone who has seen it all would probably rank them differently according to their own likes and dislikes. We are each of us individuals with each of us our own likes and dislikes. Personally like to go back into these areas, camp for a spell, dayhike and be for awhile, with really letting the land and everything just be my world for awhile as it was for the Native Inhabitants. Plus all of these areas, are just one part of the Southern Absaroka Woodland Area. And then this connects to those other areas nearby in the Washakie Wilderness, to the western parts of the Teton Wilderness, to Yellowstone nearby, and more. Just my take on it all.
Now plus in describing everything, it is good for the newcomers. But do think people should not be told everything for there own exploratory urges and desires. In this day and age, people want all the information. But in times gone by, people did not have all of this information but they just went, saw things, experienced things, and everything with their lives becoming richer for it. Take a look at the mountain men of old, they went west, trapped the beaver, saw new sights and had new experiences.They just went for it. Think quite a few are followers these days. Not Me! I wanted to see the back wild country and so I went. It is all this country in here and it takes more then a week or two to see and know it till it then becomes a part of you. I could give a long intense description of each of these areas, plus other areas in here and nearby not included. But it is all out there waiting for the people to get back into it's nooks and crannies, and whereby they will call it home. Just as it was for the Native Inhabitants .... Home! Then once an area becomes your Home, it takes on an entirely new meaning and significance.
Now Yes the main way into that portain of Mountain Creek coming off of Overlook Mountain, is via the trail thru Dell Creek. But there is a route up along this creek drainage here where the map shows no trail. Have been on it and it is a good route. Most probably created and maintained by the Outfitter in here.
Wishing You The Very Best!