So you are able to login to your Blockchain.com wallet, but you can't spend or withdraw any of your coins? Correct me if I'm wrong.

Assuming that your partial seed phrase is for your bitcoin balance, and not for ethereum, the best solution is to use the seedrecover.py script from btcrecover to guess the last 4 words of your seed phrase. Since you have the list of addresses in your wallet, you can supply them to seedrecover.py along with the words of your seed phrase to speed up searching, with detailed instructions at https://github.com/3rdIteration/btcrecover/blob/master/docs/Seedrecover_Quick_Start_Guide.md

You can also get your xpub (master public key) from Blockchain.com and supply that to seedrecover.py to help it guess the rest of the words in your seed phrase. In fact xpub is preferred over giving it your addresses so if you have your xpub, then just give it that, and it won't ask for your addresses.