You can't mix and match attributes from different fighters with different styles and expect call it a win. If Pernell Whitaker had the punching power of Bob Foster, you can bet your ass he'd fight different. He wouldn't need to fight the way he fights. There would be no reason to.
Scrolling through the thread i see an amalgam of qualities to make up the perfect boxer. Which boxer came closest to havin' 'em all? For me, it's SRR.
On the attack, and general physical attributes yeah I agree. On the defence, not so much. SRR + Whitaker might be the best combo if you could only use 2 fighters.