Depending on how your oven's set up, you could remove all the racks and put a couple bricks on the bottom, around the burners (assuming an electric oven), if the height is the main issue.
My old oven had room for one large stock pot and one small one, if I put them in just right. The weight was so much that although i didn't have to take out my bottom rack, I did put bricks underneath to support the weight of the full pots.
My old oven had room for one large stock pot and one small one, if I put them in just right. The weight was so much that although i didn't have to take out my bottom rack, I did put bricks underneath to support the weight of the full pots.












. Never had a problem, and it has never made anyone sick either. 