I was thinking about what existing HeroClix figures could fit in with the scale of Pacific Rim figures.

Here's what I've come up with so far:

MM097 Giant-Man
AV038 Giant-Man
GG043 Stranger
SM050 Imperiex
BSI014 Motorized Patriot - Technically it isn't PR-scale, but his sculpt stands as tall as the Jaegers, which makes it very easy to pretend he's some sort of old-timey Jaeger.

Finally, take some Ravager Battle Armor figures...

eMouse