As a former rugby player i would have to say judo i was doing osoto gari on the field way before i put on a gi .
a good wrestling shot can be good too but its hard to do that and make it not look bad when you have him in the air .
morote gari would be good for you to drill
Morote-gari
that and if you can perfect kouchi makikomi/ or kouchi sutemi
<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/d1p3qHdfO7A&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><embed src="http://www.youtube.com/v/d1p3qHdfO7A&hl=en&fs=1" type="application/x-shockwave-flash" allowfullscreen="true" width="425" height="344"></embed></object>
or tani otoshi <object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/O2HGqT7fnAQ&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><embed src="http://www.youtube.com/v/O2HGqT7fnAQ&hl=en&fs=1" type="application/x-shockwave-flash" allowfullscreen="true" width="425" height="344"></embed></object>
anything you can grip and drag down really you dont want to have to pick him up cuz you'll prob get called for it .