Fulgore was one of the few in KI2 who had two good Finishers--The 'laser/satellite' No Mercy was nasty work (especially in a combo), & the 'Transforming gun' Ultimate improved on the same Finisher from the first game (You've got to be super spot-on when doing the move, though).
I remember having the ultras memorized for fulgore on the first ki and playing it on the arcade cabinet made it way easier to pull off those maneuvers 😂
Aside from the badass theme song of the first game, I'm not too familiar with the Killer Instinct series, but I have to say the finishers youve shown us so far have been pretty lackluster compared to Mortal Kombat. it comes off as "well, fatalities greatly helped the success of Mortal Kombat so we need to have them too", and they just shoehorned them in during the last phase of development. if there are any Killer Instinct fatalities that fans of the series think are awesome, let me know so I can give them a watch!