All I can do is underline what Sento said.
-Lock your hands low, around the waist. Then use your head/neck to push or like, leverage your opponent. Being tall, you should be able to get good leverage. It is unlikely that you'll just bear-hug a guy and fold him over, but if you have him around the waist, you have got him in trouble. Keep the pressure on, circle towards his hip, and just like you said, when one technique or going in one direction doesn't work, you take what's available. If his feet get too far apart, grab or hook a leg. If he stands up to straight scoop him up and dump him, or trip him. If he leans too far forward attack his head with snapdowns or headlocks.
-Be careful about pulling guys on top of you! I was thinking about the"Body clinch" and "trips" in a very non-specific way. Guy is off balance, so you trip him. But like Sento pointed out, if you kind of hug somebody who is not unbalanced, then sorta flop down you are gonna be in trouble.