That is the same team that I have / am building. I had to draw the line somewhere haha. I had purchased a Widow and Fury but changed my mind on them since my love for the characters isn't really that strong aside from the main 4.
With close to 40 HT figures now in my collection, I am sharing your sentiment and not getting every single figure that HT is releasing.
I did not pre-order the HT MMS 191 Tony Stark and he is going for audacious pricing in Singapore now.
I guess I will stick to the final scene of Tony Stark with all his main armors in the ending battle and call it a day.