Yes ethereum is the best so it has first position in altcoin section
You are right, it is in the first position in altcoins. There is no other altcoins that can compete with Ethereum lately. XRP seems difficult to overtake Ethereum, its marketcap is much lower than Ethereum nowadays. Let's see the comparison below, it is quite big gaps.
1. Ethereum (ETH) : $21,016,473,676
2. Ripple (XRP) : $8,581,454,528