Understand that if not your private keys it is not your coins. This means that an exchange site is not the venue to keep your coin for a long term and choosing a perfect wallet depends on your motive.
There is some wallet that is open-source, good for buying/selling of coins and tokens. It is easy to use but with minimum security and you won't have a problem using it if you prevent human error though.
We have some with good security but can only take a few sets of coins/tokens not that easy to use due to security priority but you still need to prevent human error though.