One of the most popular and valuable trainers has always been Lillie, who has received non-stop love and many prized cards since her first appearance in Sun & Moon Base Set
However, in many metagames people will swing at her to force damage or trades so that she'll be more expensive with Commander Tax
Of course card draw is not always the regular card draw everyone has in mind, where you put a number of cards from your library into your hand, but appears in other forms or abilities the most common of which are: Impulse draw: Exiling cards from the top of the library to cast them for a limited time period
The best zombie commander in MTG depends on playstyle, but Wilhelt, the Rotcleaver is widely considered the most consistent option
its not a flat rate like most sites
Getting to perfectly sculpt your hand and generate card advantage should be enough to win plenty of games