I also have some altcoins on the Erc-20 chain, and I find it hard to move them around without paying a lot of fees. However, I think there are some solutions that can help you reduce the fees and be prepared for a bull market. One solution is to use a Layer 2 scaling solution, such as Polygon or Optimism, which can offer faster and cheaper transactions on Ethereum.
Then we have the same problem. I also have coins that I want to take out from MEW and I cannot do it because of the expensive fees, especially in the ERC20 department. I think the lowest is $3-4 just so the transaction would go through without any issues. Because before there was an instance where I paid more just because it keeps on failing. If I remember it right, it cost me $20 in total until I realize that I must not use the lowest transaction service to push through. Now, I don't want to happen again but I lack the amount needed in my old MEW account. Sending it some will be another waste of money and it may not be worth the fees if I do it.
I have not tried the services that you mentioned yet. I may check that out and see if a solution can be done in a cheaper way.