Depends if you're doing the work during the standing or not. But I think you can use the hanmi stance, it's similar enough to what this Yiquan guy is using:
Now that's interesting. Being immovable while maintaining just one of the three pairs of opposing forces...
Hmmm... "looks" similar, but it's not... there are a few key differences - one you've already pointed out. Another is where the weight is centered... and how it is distributed.