If https://github.com/huggingface/transformers/pull/7194 2 gets merged, the following change seems beneficial:
Pycharm Preferences Update:

Before the change, the first half of imports autocomplete.
image1250×784 65.3 KB
After Change, without modiying
image1393×485 39 KB
After change, with new pycharm settings:
image872×653 47.9 KB