I have been eyeing the rat 5 the tak 1 and a ranger 4 or 6.
I cant decide, someone make up my mind please. only requirement is micarta grips
You are in luck as all the knives you mention have micarta handles.
I looked at the RTAK1 and didn't like the blade geometry and didn't feel like it would be that good at slicing. A smaller knife like this isn't going to be a chopper so it needs to be what all knives should be, a cutting tool. It felt OK in the hand, but not that nimble, if that makes sense.
I wound up buying the RAT5 and really like it. Great blade geometry, great slicer, good steel that is easy to sharpen and maintain in the field. It can do some fine cutting too, and is a fair skinner due to the large choil that allows you to safely choke up on the blade for fine control. I have done all kinds of camp chores with mine and it is a favorite on hikes. A sturdy, reliable performer.
I looked at the Ranger series knives, and this is a different kettle of fish. This is more of a heavy duty survival tool. It isn't 1095 like the RAT or RTAK, but a spring steel, 5160. I don't know how they temper it, but I have seen examples of nothing short of abuse that these knives have taken and they stand up to it with no problem. I have a knife dealer friend that sells them and he used an RD7 on a camp trip when he left part of his gear at home and he was amazed at the knife. He opened food cans with it for three days, chopped firewood, split firewood, made tent stakes, did some shelter building, and then goofed around a lot chopping and just playing with it. He told me the knife was still fairly sharp after three days, plenty sharp enough to still be usable. No damage to the blade even after all the chopping and the cutting open of the food cans.
His only gripe was something I picked up on, and that is the handles themselves aren't all that comfortable. Also, again the knives are thick bladed and don't make the best slicers. But for super heavy duty camp use he gave it a excellent rating. While he uses other knives on is outings, he always has the RD7 stashed in the truck, "just in case".
In the end I decided I wanted a good knife that could do all my cutting, slicing, light wood splitting, and finer cutting if I needed it. You can still easily open food cans with this knife, but I won't ever need to chop my way out of anything, nor will I need a heavy duty utility blade like that to do as is popular here, "process wood". So I bought the RAT5 and it has filled the bill for me perfectly. Your own mileage may vary, but I think you will find the most overall utility value in the RAT5.
Robert