My choices are ETH, XRP and TRON.
They are always top notch coins. We witness XRP and TRON had a great Q3 this year. They had a lot of achievements and events going on in 2018.
For 2019, I think is the year of masternodes and privacy coin. I can't tell which ones will go to the top but I would love to see a privacy coin like PRiVCY.