I carry my weight at the front too - never in a million years did I think a jumpsuit would look good on me, but I tried one on and it looks fab.
Wayne Cooper at Myer - discounted to about $65. I think the secret is that it has a tailored waistband (instead of elasticised). It's lengthening (I"m short too) because it's all the same fabric, and the top is quite sexy without giving too much away. The pic attached is quite straight (the model is definitely not my shape) and it looks much more curvy around the top.
Perhaps try a jumpsuit instead of a dress? It's really comfortable, no pulling up/pushing down and easy to accessorise?