Yes, Vampires are good in MTG and among the most supported and powerful tribes in the game
Elenda could also be a consideration for more traditional gain and drain lists perhaps as well
But Urborg is different it's not itself a Swamp, it only has the word "Swamp" in its text description, which the official Commander rules point out is okay: Basic land words (swamp, forest, etc) in the text box of a card do NOT represent a coloured mana symbol
Here, you can get a one-side sweeper for small creatures or create a copy of a strong elemental, but the default modes of drawing two cards or creating two Treasures are always useful
third, the fact that a spell cant be countered doesnt mean it cant be targeted with a countering spell or ability
The new cards in the deck matter, too