I would say the Adidas Boston or Brooks Hyperion Tempo which are similarly cushioned to the Turbo, but firmer and more stable. They have less issue with the forefoot bottoming out too.
Given your comment on the Boston though, I would say give the Reebok Floatride Panthea or Reebok Forever Floatride Energy 2 a try. They are both similar level of cushion but a bit firmer, more stable, and with more outsole to them. They both still have a lot of pop too. I don't have issues with the forefoot bottoming out like in the Turbo either. I'd say the Forever Energy is a bit firmer than the Panthea. It is TPU and more like a Boston with a bit more underfoot. The Panthea is pebax like ZoomX paired with an eva rim. The Panthea is more like a more stable Turbo and maybe a little lower to the ground, and then Forever is more like a bit of a beefed up Boston and maybe a bit more underfoot.
If you want something a bit more differentiated from the Boston with more cushion, go with the Reebok Floatride Energy Symmetros.