Overhand is a bad stopper (left most)
Extra time through ( middle knot) is a good stopper, depending on the cordage.
Three passes through the hole (right side) is a good stopper, depending on the cordage.
The OH is a great, *only* stopper, if one is trying to set one snug to something (as I often do, concluding a whipping) --though it is difficult, at least in fiddly stuff, to get is real close. Which benefit doesn't deny shortcomings elsewhere.
"Extra time through" :: strictly speaking, I think you're describing a knot I've just been playing around with (hmmm, Ashley's #511 (which is ~= #577, albeit different dressings)), where one DOES take the tail an "extra time through";
but are you showing in fact the Strangle knot ("half a dbl. fish") ?! --which knot can be transformed into your third,
less one turn. And this third/rightmost-imaged knot is what we could call a "Stevedore&-a-bump"/"Fig.11; *cascade* the wraps to be from away-from-loop towards it, and you'll be wrapping around TWO strands, more happily taken by firm rope not liking a 1-diameter turn. --something done for making a heaving line knot, IIRC.
(The "Stevedore" is often presented in knots books as something once (still?) used by . . . stevedores; but Cyrus L. Day's Art of Knotting & Splicing, which is a decent work, claims no-such-thing and that it was just a knot promoted by the Stevedore rope company. --either or which explanation informs us of no reason Why...?! My surmise is that the added turns --which hardly increase any meaningful bulk-- are to give surer grip on the S.Part so that it's nip of the tucked-out tail holds.)
*kN*
