So many to choose from:
1. Cowgirl
2. Legs over shoulders, with your hands on her shoulders fucking her has hard as possible. You can really wreck a girl this way if she's into it.
3. Speed bump, ideally with you holding the girl's hands down
4. Stood up bending over
5. Stand and carry (most WGs are too scared of being dropped to do this, only really works if you are strong and the girl trusts you)
6. Face Down Ass Up
7. Missionary with pillow under girl's hips for more penetration
8. Variation on 5. you sitting on edge of bed with girl sitting on your lap facing you
Most of these I've only done with civvies... must plan a bit more to try them out with a regulars