Welcome to this forum GetaPix.
First off I wouldn't let the security situation on the Bell Traverse be an absolute turn-off. There is some risk, but it isn't high, and, as you might have read in the other references, there are a number of precautionary measures you can take. But no-one can guarantee your safety up there though as it concerns crime, which is why I always mention this alongside a hearty admiration of the route. I don't believe that trying to keep things quiet about these problems is the right approach, and believe hikers should be clearly and specifically informed on what is going on and what has happened in the past. Go there informed and aware, rather than not go at all, but if a potential risk is not option for you at all, then rather go for another route.
How the Bell Traverse rates photographically compared to the escarpment between Mlambonja and Organ Pipes is quite subjective but I'd lean towards rating the the Bell Traverse higher.
For your info though, the three passes between Mlambonja and Organ Pipes are Xeni, Cockade and Tsekesteke. Xeni is a very challenging undertaking, and wouldn't readily recommend it for your purposes. You do get good perspectives on the Plume and Cockade from the pass, but by far the best scenery is on the escarpment around this area, which you can reach using other passes. Cockade Pass suffered a flash flood in recent times and is in bad shape - maybe not a good idea for you at this time either. Nice shots of The Elepghant and Xeni Peak looming overhead from the base of these passes, but by far the best shots of this area are along the top of these passes, particularly from the Elephant and from the summit of Cockade Pass.
Mlambonja Buttress is worth a visit too, but for good photography you'd have to be there in the mornings. Later in the day it's just to much glare and contrast.
Tsekesteke Pass is a good option, though tends to be a bit overgrown at the bottom. Combined with Organ Pipes Pass over 4 days (which it seems is the time you have), will give you lots of time for photography, and you can easily do a loop to Cockade Pass and The Elephant from there. It would also take you over Cleft Peak which gives you a classic, grand view over the whole area. The Column and Pyramid would feature strongly from various angles on this route. The view around Windy Gap and on The Camel will give lots of opportunity for photos of the Organ Pipes and the jagged formations of Cleft Peak, and Column and Pyramid. You could even spend a night in Roland's Cave, again a place for awesome scenes. Bear in mind that Organ Pipes Pass is a major smuggling pass and that you may encounter smugglers there even in the winter.
Hope this helps, enjoy, and do let us know how it goes.