"best qb 2018 draft" first of all doesn't mean much based on the fact that not every draft class is going to be qb strong. Geno Smith is the best qb of the 2013 draft.
Secondly, it's too soon to tell anything, it's his 2nd year starting and he has already regressed a little. Rg3 was all the hype after his big year running read option. Also Kaepernick was considered great around that time too.
3rd many teams just aren't built for immediate success and constantly keep having qb busts and it's more about the team around the qb. Tannehill was drafted same year as RG3 and considered a bust now with a different team he's revived his career. Kirk Cousins (also 2012) has also grown to be a good qb while RG3 isn't worth much and Kaepernick has been long gone
Both Baltimore and Chiefs were pretty strong teams before their new recent qbs and 2020 is a hard year to judge because the first half of the year many defenses were playing absolutely horrible (worse than usual), teams aren't as balanced, there's a whole division with a losing record
Either way great passing will always rule the day, and no evidence that White qbs don't excel doing that. Running qbs will be gimmicky with limited success.
Think about it, when you pass you have a wall of blockers to stop people from getting you while you have multiple receivers run down the field unhindered...if you have accuracy you can get a big play. When you run you're breaking through that wall of protection to the defense side and everybody is going to try to stop you as soon as you cross the line of scrimmage. It's why running backs have short careers. No difference with running qbs. Running plays average like less than half of each passing one
Defenders can cover receivers but can't try to take them down.