Those are good points, I guess I was pointing out the similarities but being too vague earlier; I noticed that each of those three knots (taught,blake,estar) utilize a clove hitch/half hitch to compress the line running between it-- rather ingenious idea I think. Perhaps many knots do, but these sort of stuck out to me. Also the blake makes use of a passed through tail perpendicular to the hitches so they cinches down on it, similar to estar. Really a great knot
I noticed someone mentioned the zeppelin bend, I think that knot
is great and now I've been fiddling around trying to get something between that and these knots, what with the multiple cinching half hitches idea.