Could call it maybe the "Veteran" rank. Also maybe one for members with 10k+ posts? Think that may just be Member lvl 4, but that's so basic. Also maybe one for people over a certain amount of reputation or thanks (reputation may be annoying to deal with since it can go up and down).
As for image titles, after going through the first 4 pages of this thread, I like Ravallo's revamped ones the most. They're simplistic and get the point across (almost like Apple branded feel to it if you get what I mean).
Rep. Power: 126
Minion: 11/28/12-3/15/14
#LOGS
12-02-2020 ⌨ [MPGH]defaulto got gifted the Premium Membership from [MPGH]Azuki - sponsored by [MPGH]Flengo.
27-11-2019 ⌨ [MPGH]defaulto captured the GFX Team Base together with [MPGH]Howl & [MPGH]Poonce.
08-14-2017 ⌨ defaulto joined the game.
Looks too basic lol prefer the old ones