Some great points in the posts above
I would add a little point (I know you said about visual aids), that the 'out' position, when passing the parked vehicles, also helps you to clearly see the drivers and any passengers (all potential hazards).
Also the potential 'feet' (of people), between the parked vehicles, and indicators for the 'about to move' cars, and also from every direction.
I agree too that the 'right' position is to wait, until you believe it to be clear, and I understand fully that you tried to do this. You are then in the psycological scenario. When you get the 'bolchy' driver, you are relying on your previous allowance of this possibility to act. The 'out' position gives you the control and as a first line of 'defense'. The second is to then chose to take control (as is also stated above), but before you do - try to make eye contact, and indicate by hand gesture - perhaps a single hand flat as a 'wait' gesture, and a brief smile, then reverse, may help defuse anyone.
Sometimes this simple 'control' of the road, and your 'space' around you, can emit 'confidence and control' and this can help others to be less 'bolchy', but you have to have an escape route planned - for the rogue driver who insists on testing your skills.
I agree with the stopping point too, as it is generally considered that the stopped driver may be a 'hazard' but by not moving you are inviting another to work around you, so if 'hit' they are more likely to be in error. However it leaves them moving about you, which does happen tons of times on the roads, and does work, but of course it needs everyone to drive very carefully, keep glancing eye contact helps keep you informed and the situation/s diffused.
The story of the prosecution without witnesses is interesting.
With the car hit down the side too, I would have thought that the car 'standing still', would have had a better chance of proving innocence - or less blame, but better skills and better controls, help prevent the incident one hopes
- hence the post of course !
I call the control of the road, and your pace, 'stance' and that can give you an 'edge' in many areas of driving, but it is subtle.
For example someone creeping along maybe safe but tells the impatient driver waiting that he may be able to pass if they 'go for it', so they do. But by being out, go with care and progress and look to the driver waiting. Because you have shown control, they tend to wait in these circumstances as you took control in the first place.
This could also lead us down the 'depends on what you are driving' too but whilst true to a degree it is not totally true