I'm not sure if it's good to have two Ghibli movies on the list, Mononoke would be enough. If there were to be a second one, I'd at least go with Omoide Poroporo, a non-Miyazaki one. And if there will be two Oshii, Patlabor 2 might be more relevant than Jin-Roh. Also for movies that are dependent on series, like Evangelion and Sakura, I don't think they fit on the idea, since you'd have to watch the series before. I'm also unsure about the reach and relevance of some of the entries, such as Tekken, Shojo Tsubaki and Roujin Z (even more so considering Memories is already there). Here are some of my suggestions of OVAs that havern't been mentioned yet:
Otaku no Video (91)
Burn Up (91)
Video Girl Ai (92)
Aa! Megami-Sama! (93)
Taiho Shichau zo (94)
El-Hazard (95)
Gundam Dai 08 MS Shoutai (96)
Rurouni Kenshin (99)
Sakura Taisen (99)
>>2531I think a "starter pack" isn't supposed to be obscure, it's a list of the most basic and influential, that might give a taste of what was being done at the time and serve as foundation for people to go look after what they might be interested.