I believe just about any ficus species could be a 'Strangler' given the right circumstances. I have a Ficus Watkinsiana that I bought from a native nursery as a rooted cutting, and that was labelled 'Strangler Fig'.
Try wedging a fig seed (any species) in the fork of a tree, keep it moist until it sends a root down to soil level, then sit back and see what happens
A few years ago, I took a Queensland Small Leaf Fig (Ficus Obliqua species) from the top of a huge boulder - must have weighed over 20 tonnes, maybe more. The tree was sitting in a shallow depression on the top and stood about 3 metres high. There were no visible cracks in the boulder, but it had sent one root down over the side of the boulder and into the ground. When I severed that root, the tree fell over. I had a look and there were about six very small roots directly under the trunk that had been sitting on a bit of damp leaf litter - and there were no cracks in the shallow depression. The base of the tree was over 100mm across. If that boulder had been a tree, it would have been on the way to extinction.