Re: Tyson's best victories ...
A solid list.
I may be inclined to put the Tubbs victory at #4 instead of the Biggs fight, but otherwise your list is very good.
Berbick - Showed impressive maturity and patience. Fantastic knockout.
Spinks - Blasts out the lineal champ in double quick time.
Holmes - Is patient and lands a beautiful right hand and finishes off a still-dangerous (but past it) Larry Holmes.
Tubbs - Shows some decent inside technique and unleashes his heavy artillery against the underrated Tubbs. KO was superb.
Thomas - The way Tyson zeroed in on his wounded foe is the stuff of legend. Comparable to a prime Dempsey.
Bruno 2 - The real Tyson's back! Just overwhelming attacking prowess and ferocity.