Definitely the Morishima Manhatten Mayhem match for me, although a couple of the Nigel matches would be honourable mentions. But the first Morishima match is one of my favourite big man/little man matches ever.
You need to watch the first match, but his match against Christian at Over the Limit 2011 is one of my favourites of his. Lots of neat storytelling and counters.
The Foley hardcore match at Backlash 2004 is superb too.
Those are the two that I'd consider "great".