I doubt Phonak would satisfy your needs if bass quantity is what you are after.
Bass heavy phones are of 2/3 types. The most common ones have a bumped mid-bass, but the models at the lower end lack the tightness, detail and clarity. I've heard a few of the models mentioned below, but not all. Whatever is italicized is based on personal experience and the rest based on Joker's reviews.
Good bass quantity? Some of the Xears at the low end like Nature N3i (I've not heard it), TDIII v2 have good quantity of bass. But they have a slight bleed into the mid range. Fischer Eterna has great quantity of mid-bass, but still fun to listen to unless you are looking for engaging mids or sparkly treble. Fischer Consonance is said to have even more quantity and around the same ballpark as Eterna in terms of SQ - with a V-shape and better treble. Beyerdynamic DTX-101 / MMX-101 is another that comes to mind.
At the lower end, Dunu Trident is said to be decent overall. Nufoce NE-7m/6 was good and had a signature that was easy to listen to, but has been discontinued. NE700X is supposed to have similar signature, but better. MEE M31 has good quantity, but it's not a phone that is at the same level as the Xears or Eterna. Soundmagic PL11 is a budget choice.
Coming to the other type, the phones that are good in sub-bass with a good / flat mid-bass. Hippo VB is good at this as it produces a clean, snappy bass with good extension. But most times, you might feel the bass is 'lacking' since most of the time a bass heavy phone is equated to mid-bass hump. Playaz N1 has a slight emphasis on the sub-bass than the mid-bass as well. Atrio M5 (MG7) has a flatter, cleaner bass as well, but it's not for typical bass-heads.
There are those which do better at both regions, but they tend to be a bit costly. Radius DDM-1 had good bass, FX500 is supposed to be focused more on the sub-bass than mid-bass, FX700 is focused more on the mid-bass than sub-bass. GR07 had very good bass without bumping up too much. EX-1000 has a great bass, which is just about adequate in quantity, but has very good quality and details. If you are after good quantity, DDM-1 and possibly, FX700 can be looked at. But they would drain your wallet for sure.