Great advice. Keeping a log of events with dates and times will help with identifying a pattern.Welcome to the forum.
It may help to keep a "spook journal" or similar record of things that are going on, as it will help piece things together over time.
Record day time what went on, and what you did to try and find out what it was. It is important to write everything down even if you find the reason for it straight away. You may find a door that opens by itself a lot and one day you discover that the catch is faulty. - that kind of thing. Or in your case you may see a figure out of one window more than any other.
Noises on rooftops can be birds or four legged animals. Sometimes birds have a routine and will pick one roof to sit on more than others.
I remember being woken nearly every day by a bang on my bedroom wall. It took me a while to figure out it was actually birds flying into and hitting a telephone wire attached to the wall. It only happened at first light when the birds were awake - but they couldn't see the wire!
So yours could be birds perching on an antenna, then taking a leap off leaving it to wobble and rattle, or a wire up there flapping about. Always look for the obvious first, but sometimes it is not so obvious what is going on. It's not unusual for birds to try cracking nuts or snails by dropping them down your roof, and sometimes they fly into things, then fly off, so may explain your garage door bang. Or maybe it was a kid with a catapult.
Keep a log of what is happening, but so far nothing to worry about.