I made this last night and it was really excellent:
https://www.simplyrecipes.com/recipes/fish_chowder/Now the recipe gives you all the ingredients, but it's basically:
Onions
White Wine
Clam Juice
Potatoes
Seasonings (Thyme, Salt, Pepper, Bay Leaf, Old Bay)
Heavy Cream
Fish
To those I added carrots and celery and a some clam, too.
Cook the onions, carrots and celery in an oil/butter mix until tender (I cook the onions longer than the other two). Add wine and reduce by half.
Add seasonings, potatoes, and enough clam juice/water to cover the potatoes. Simmer (covered) until the potatoes are done.
Lower the heat on the pot and heat the cream separately. Add the cream and the fish (and the clams, if choosing to do so) and keep the heat low. Just steaming, never boiling, and cook until the fish are done (10-15 minutes, tops).
Add some parsley for flavor and serve with a nice sourdough for dipping.
REALLY good on a cold night and cooked a lot faster than I was expecting. It helps if you cut the potatoes smaller.