Here is a good source to decide which altcoin to invest in. I would never buy a dead altcoin with no development except Doge. Doge is unique and will be successful without much development.

Source:
https://twitter.com/el33th4xor/status/1068856384983363585?s=21dead alts are:
- Verge
- Holochain
- Bitcoin Private
- Pundi X
- Poet
- Decentraland (MANA)
humm i think you might reconsider using activeness as a pre-requisite for your investment in crypto. Go check out dragonchain. They are always having updates but yet price continue to tumble. Some of the coin you listed out as dead coins might still do well on the long run. Expecially verge and pundiX. I think its too early to write-off those two.