1. Carnado
2. Neo
3. Ethereum Classic
4. Stellar
5. Tron
6. Verge
I would pick Carnado because I think it's a cheap coin with alot of potential.
Actually this function is also owned by Ethereum (ETH) to prevent the occurrence of DdoS attacks or simply thousands and even millions of Requests at a time, which usually causes delays in transaction processing. Each transaction will be charged a small fee of 0.00001, so that any malicious intention to flood the network will not be possible. Even if anyone intends to do so, automatically the funds owned by the attacker will be drained before the attack can damage the network. and I am sure that with this advantage Stellar will be better to hold it forward.