The first thing I noticed in a wallet was open source. If it is not open source, I hesitate to store crypto in the long run.
If the best wallet supports a lot of crypto, I think the unstoppable wallet that I will recommend.
There is a discussion of discussion about Unstoppable Wallet to attend any discussion that helps increase knowledge about it.
It is good to use an open-source wallet for better safety options. However, a wallet has been an open-source wallet is not enough to guarantee the wallet as the best or good crypto wallet. Mind you, this is always a new development in the tech world every day and if the wallet new, or all source code are not totally check there is still a chance that the dev team have a backlog, or something that consumer their wallet user internet data for crypto mining (which is something that some dev do now)
To be even safer, use a hardware wallet because no matter how good a software wallet is, it does not guarantee 100% of the assets will be safe because it is still possible to connect to the internet.
Compared to the wallets mentioned, I think Unstoppable Wallet is better. Maybe because I am familiar with Unstoppable and may not have used Best Wallet.
An open source wallet allows developers to get feedback from users to fix any shortcomings that occur.