This tree could be made into a formal upright tree - straight trunk growing straight up. If you like that idea, there is a branch just above the 2 thick lower branches, growing up and a bit to the right. If you use the existing tree as your stake, you can tie that branch to the trunk above so it's in a vertical position.
Once that branch is set in position, you can chop the trunk back immediately above that branch. That branch will be in the front of the tree and the scar left from chopping the tree back will be in the back of the tree, hidden as it heals. Here is a trunk chop sequence on a maple tree:
Tree in the middle with big white scar:
After a couple month's growth:
3 years after the chop:
Wound almost healed:
Progressing:
Most recent image:
Re your first image. You could also chop it low like I did the maple and make 2 or 3 trees out of the top parts left over after the chop. You would allow the chopped part to grow a new leader and start working on building a tree out of the chopped stump when the change in taper between the stump and the new leader is not too offensive to the eye. The transition in the taper should be smooth.
Your first tree is the hardest to find potential in. The others have more going for them in terms of both options and potential - not sure how interested you are in exploring that - don't want to go all bonsai on you on the succulents forum unless you have interest. Sometimes the best way to explain what can be done to someone else's tree is best explained by using what images of other species are at hand to serve as visuals.
Al
