My personal favorite for tying two ends of a rope together is the Flemish Bend. It's simple, strong, does not slide, does not require stopper knots (unless used for life-critical applications), allows mixing rope thicknesses and types, relatively easy to undo even after heavy load.
But there are situations when I need to pull on the rope ends in order to get them together. Flemish Bend and all other knots that I know are very unhandy to tie under tension.
Which knots would be best in this case?
Maybe some of the knots I know are suitable for this, but I don't know a technique for tying them conveniently when under tension. E. g. I've read that the sheet bend was used by weavers to quickly fix a snapped string without halting the loom. I've tried tying a sheet bend under pressure and it was difficult -- likely because I don't know the technique.
So when you recommend a knot, please also describe a technique for tying it while pulling loaded ends to bring them together.
UPD1 Examples of typical real-life scenarios:
- tying a rope around a bag to compress it,
- tying a cardboard box to prevent it from opening/misaligning,
- holding a piece of furniture from falling apart as you work on fixing it.
See madskillz illustrations below!
I guess, the trucker's hitch is appropriate for those cases, but you have to measure it correctly: if you make it a bit too long or too shirt, you'll have to undo it and retry. Also, oftentimes you don't have enough rope length to make a trucker's hitch.
So I would like to learn a simple knot that would let me tie the rope tight without a need for a second person pinching the initial half-knot to prevent it from loosening.