Take a look at Bitstamp, they take IBAN deposits, but the down side is that it can take a few days to clear. There are faster ways (mostly credit card based), but you incur either fees or a bad fiat-crypto rate.

LTC is definitely faster, but it isn't a trading pair with most of the other crypto unlike BTC and ETH. It just doesn't have the same volume to be a viable alternative at the moment, I guess.

I use a mix of hot wallets and hardware wallets. I rarely use Mew unless it is for checking balances of tokens on the go or signing stuff (via a ledger hardware wallet).