fazer: the answer is yes.

i received no FA last reset and finished t10. tagged of course. and i'm obviously not the only example. there's countless of such examples from many alliances (evo/laf included, as well as many other ppl such as sof/sol even, omega puts up t10s, sanct has a guy (ley i believe) who puts up unaided t10s etc. etc.). despite what the flaming is leading you to believe, it's actually a pretty common occurrance to have non FA-ed tagged t10 now.

i dont think untagged is possible though unless you are counting "untag yourself last minute". and no one is stupid enough to do that anyways just for the sake of being the first untagged t10.

speaking of techers and finishes, i personally have 3 alliance rank 1s as a techer (none in the EE era though). one of them was FAed though, the other two were legit. i'm not really embarassed about the truth, i just says is how it is =) bakku didn't get any FA last reset and won as a techer with a record breaking nw. he probably deserves it too, that one 1A victory that i got some FA on, bakku was rank 2 that reset (and never got 1st until last reset). so it was a long time coming that he finally had a shot to win it again.

i think more often than not, techers are usually on top... but of course if there's too many techers (like this reset) then tech prices would tank and casher/farmers will win.