I have a 40 HP Massey Ferguson. I'd weed wack, clear the area going into the mess, clean, nothing to trip on, parking lot smooth. Tip toe in, looking up a hundred times, tie onto the top of the first easiest tree, and pull it clear. Clean it up, start on the next. If the root ball is still in the ground it may twist around and pull out, or twist around far enough to be clear where you can work on it. With the leaning trees, I'd go to one of our sponsors (I use Bailey's) and buy 3 pole saw extensions and a hook, and 120 feet of braided 1/2" rope. You can sneak up on the leaner, looking up a hundred times, and get a pull line up about 20 feet, or out as far toward the top as possible. Learn how to tie a running bowline, hook it to your truck, and pull from 120 feet away. Maybe a good time to buy a nice used tractor with a front end loader. You will use it the rest of your life. Learn how to walk with your head tilted with one eye looking up and the other at the ground. You have a ton of stuff gravity is trying to pull down on you (Widow Makers), and a ton of stuff on the ground trying to trip you. If you have to step over it, cut it off and clear it out of the way. Any thing you need to pull, use the rope from 120 feet away. If you cut 20 feet of top out, use the rope to pull it over to the burn pile, then cut it up and burn it. You can run the rope around other trees to pull from different directions, or buy a snatch block so you don't damage the bark on good trees. Look up a hundred more times. Having a "Landing" where you can drag Everything to, to process, makes working much easier, and you don't have to look up a hundred times. Nothing over you but birds, good luck with the project, Joe.