A few things off the top of my head which are currently missing from this:

• Apple DOS, 1978-1983
• Apple ProDOS, 1983-1993
• MacPaint, 1984-1988
• MacWrite, 1984-1994
• Apple GS/OS, 1988-1993
• A/UX, a Unix operating system, 1988-1995
• Macintosh Portable, 1989-1991
• Taligent, 1992-1998
• Apple Workgroup Server, 1993-2003
• Macintosh Application Environment, 1994-1998, a $549 software package which allowed running System 7 on Solaris and HP-UX
• QuickTime VR - 1995-? …to my surprise, apparently still playable until Safari 12 in 2018
• MkLinux 1996-2002, a Linux-based Microkernel for PowerPC
• Apple Network Server 1996-1997 (ran neither A/UX nor MacOS but instead IBM AIX)

edit: i mistakenly listed a couple items they actually do have.

ps: anyone reading this who wants to open a github PR to add these things to the site, please do :)