Ultimates by Deniz Camp is probably the most revolutionary and based comic in both the ultimate marvel line and DC Absolute comics, only Absolute Superman gets as based as it
It really good nerds i really recomend it, here is issue one make sure to read the intro
Spider-man and X-men are probably the best in the way that they are pretty standalone and the intro text tells you all you new about the ultimate universe (a supervillain took over the world and made sure heroes didnt happened)
In Ult. Spider-man, He is a dad and becomes spider-man on his 30s. In Ult. X-men they are teens in japan, both are pretty good in my opinion.
For ultimates, if you want to know how the team forms you have to read the Ultimate Universe (2023) one shot
and for the origin of the Ultimate universe itself is Ultimate Invasion 1-4
Solid list, thanks. I’ll check em out.