I like sticking to red meat no more than once per day. On training days an egg with meal one is fine.
Anything beyond that I get from oils which is very minimal- mac oil, coconut oil, olive oil. I put that one serving in my last meal. Build your base off of this. You can see my diet in my AMA thread if helpful.
But the above foods are all fine as long as the macros are the same each day.
You can use all of these across the week- for example on your off days drop carbs and use those calories for a bit more healthy fats and work in your chia seeds and walnuts.
White fish- if you like it then eat it. If not turkey or lean chicken is fine. I like white fish so use it year round, but some hate it. It’s a personal preference.
You can use salmon, but just need to ensure it hits your macros each day if it’s included. Remember consistency is everything.