LTC is pretty nice as a bridge to XMR since most exchanges have it and very cheap to transact. Also, MWEB (MimbleWimble Extension Block) gives very good privacy. It hides amounts and address completely just like Monero *BUT* spenders are visible very briefly when the transaction is broadcast (although you have to grab the data at the time it happens or it's gone forever) where Monero obfuscates spenders with ring signatures.

Not a lot of places accept MWEB directly (you have to peg out to a transparent address), no mobile support, and the pool is pretty small...but still very good privacy vs most crypto