Well, when T'Challa subbed in for Daredevil a few years back he wasn't called Black Daredevil ;-). Also
Cyborg - Teen Titans originally
John Stewart aka Green Lantern (not black lantern)
Luke Cage aka Power Man
I tried not to get too many of the newer ones, these have all been around for a long time unlike re-casting Nick Fury, getting a black Spider-man (geez there's every type of Spider-man in the comics now including Spider-Gwen), etc. That is, not ones that have been recently created or recreated as we've (hopefully) become more sensitive to diversity in western culture.
I also agree that Black Panther isn't a racist or racially insensitive term, although panther is apparently a term used to describe big cats of various flavours depending on where you are - leopard, jaguar, puma... I do think Black Lightning, Black Goliath, etc were bad products of their times and I'm actually struggling to find others that have really lasted although I bet there were a ton in the 60s and 70s especially if you throw in the bad guys.
Not being either black, African, African-American or any other combination I can't say for sure how I would feel about Black Panther, Wakanda and their invented culture as portrayed in comics and/or the silver screen (geez, why did they have to call him the Silver Surfer, so insenitive ;-) ). But actually secretly being probably the most technically advanced nation in the world while strongly keeping to their (made up) traditions and culture doesn't seem like a giant slur to me.
Jethro - LG OLED65C7P, NB 3.0, Yam HTR6190, Polk, Harmony 680, Xbox One X