Funny that you mention the grinder because I have been trying it out myself quite a bit lately.
I love the extra physicality the grinder brings to to the table, and if you put all his offensive points into passing, he can do pretty much everything a playmaker can on the offensive end.
The only area where the grinder really suffers compared to the playmaker is athleticism, but if your team has speedy wingers to do all the puck chasing for you, being a slower center isn't as big a deal.
I'd definitely recommend the grinder/center combo to anyone who's loaded with offense on the wings and needs their center to help out more with passing and defense than shooting and puck chasing.
Here's the build I've been using:
Center (grinder)
- passing +20 (90)
- defensive awareness +10 (90)
- face offs +10 (95)
- acceleration +11 (86)
- speed +9 (81)