On your profile it looks like you're hunted South Africa. Do you want to stay with South Africa or are you open to other countries? What type of hunting do you want to do? It doesn't get bigger than elephant and tracking elephant in Zimbabwe was one of my favorite hunts. Be prepared to walk 10 miles or more per day for the best chances. Of course you can get lucky

Elephant permits are being processed and granted for Zimbabwe on a case by case basis. The hunt must be deemed positive for the overall conservation of elephant. So pick an outfitter with the right circumstances in place and preferably one who has gotten permits granted by USFWS. Book at least 10 days, 12 or 14 woukd be better. Zimbabwe has been and seems to continue to be the place to get the best deal. And with case by case, it does not seem to be a given to get a permit in Namibia like it used to be. Of course Botswana is an option but seems to be very costly.
Next biggest would be rhino, when taken in the correct context, white rhino in RSA is a good deal right now and again must have all the i's dotted and t's crossed, but has been very straigt forward. A kill hunt is very doable as is dart. On a dart hunt, you can get measurements and have a replica mount made. This is a straight forward hunt but can be enough of a challenge if you book the right area with the right people. Book 5 days for the hunt done in a large area. 3 is probably plenty in a smaller area but more of a shoot.
Hippo, same as croc, I personally don't want to do these in RSA as my impression is that they are canned deals, like a hippo in a farm pond. I'd hunt these two together as they should be in the same habitat. Mozambique would be my first choice and Zimbabwe second. As long as export permits are in order, the import permits should be attainable without much trouble.
Buffalo, the Devil's red eyed cattle

to me this is what you should consider if you haven't done it and want a real exciting dangerous game hunt. You can find a good hunt in any country or area they exist in good numbers (there were none in the part of Mozambique I got my leopard). No drama importing, striking simple shoulder mount that can fit into a normal home without high ceilings or a lot of extra floor space. Economical to hunt. If you are going to go after a wild lion or in many cases even leopard.... you are going to need bait and Buffalo produce a lot of good bait. So combine them. In fact Hunting Buffalo whenever available is a great plan
Lion has been covered. Leopard you can hunt in many places. They are almost everywhere in Africa. My hound hunt in Mozambique was very exciting. Hunting them over bait is a unique experience as well and my experience with that was great as we sat a very short time before the cat was in the tree. But leopard can give people fitscand add up to the most expensive hunt in Africa if you go back multiple times before getting one