I was talking with a friend and we both agreed that one of the things that DC does really well compared to Marvel is in creating legacy characters. Perhaps as an outgrowth from having different versions of the Flash, Green Lantern, Hawkman, and the Atom running around in the 1960s, DC always seemed to seed characters for years before bumping them up to their own titles and carrying on lineages, or creating stories which paid tribute to the originals in many different ways. While an argument can be made that the most successful legacy character was Wally West the moment he assumed his uncle Barry Allen's title as the Flash at the end of Crisis on Infinite Earths, strong contenders also include Dick Grayson (who has assumed the mantle of Batman on several occasions and even as Nightwing has been a Batman of a different flavor), Kyle Rayner (who finally stepped out of Hal Jordan's shadow to be--for a little while at least--DC's top Lantern), and Jaime Reyes (who took over from Ted Kord as Blue Beetle and has been pretty good at the role ever since, becoming something like DC's answer to Spider-Man).
But for one that I was surprised turned out to be as good as he became, and remained highly profiled and respected no matter the writer, was Michael Holt, the second man to be Mr. Terrific and hold that role in the Justice Society of America. Turning back the clock somewhat, it's specific to note that the original Golden Age Mr. Terrific was never truly a character to get excited over: Terry Sloane appeared in the same 1942 issue of Sensation Comics #1 that introduced Wonder Woman's first starring series after appearing in All-Star Comics, and he remained an obscure if reliable backing feature in that title until Sensation #63. In that time, the Sloane version of the character was that of a millionaire who had everything come easy to him that he contemplated suicide out of the sheer ennui he'd found himself in. But the usual pulp circumstances (becoming involved with a woman whose brother was in a gang and being prompted to save said brother) led him to done that costume and adapt the mantra of "Fair Play" as an emblem. But aside from a brief brush as a member of the JSA in their original Golden Age period, Sloane never had too much going for him to get readers excited over his adventures: compared to a guy who was the fastest man alive, another guy with a magic Power Ring, another guy dressed as a hawk and was the reincarnation of an ancient Egyptian prince, and yet another guy who dressed like a big black cat, Sloane was clearly outmatched and outpaced and quickly fell into obscurity sooner than his JSA teammates. Even when he was resurrected in the 1960s for those annual JSA/JLA "Crisis" team-ups, he was still never a major player until Justice League of America #171, when in a bit of retroactive continuity he was revealed to have a longtime nemesis in the Spirit King who took possession of the Golden Flash's body and murdered Sloane, perhaps the highest profile moment in a career that was less than enthralling.
So it has to be handed to writer John Ostrander, when creating the Michael Holt version in the pages of his run on The Spectre, to make Holt stand wholly apart from Sloane. They were similar: insanely smart, with an aptitude for everything, incredibly wealthy, and both attempted suicide. But where Sloane attempted to end his life of boredom, Holt wanted to end his life because he blamed himself for the death of his wife and unborn son, until he's stopped by the Spirit of Vengeance who retells the story of Sloane to Holt, inspiring the latter to become a costumed crimefighter of his own. Holt later went on to become a bigger deal than his predecessor ever was, such as helming the newly reformed JSA as chairman for several years and across multiple adventures, and being in the thick of some major events across the DC Universe (it was his and friend/teammate Dr. Mid-Nite who uncovered what really happened to Sue Dibny during the events of Identity Crisis, still one of the shocking revelations of any DC "Crisis" event). Holt even met his predecessor thanks to some time-travel, fought off KKK members in this past, and even forged a close friendship with his predecessors teammates, being good friends with Jay Garrick, Alan Scott, Carter Hall, and Ted Grant (Flash, Green Lantern, Hawkman, and Wildcat respectively).
I always believed that if Jordan Peele wanted to do a film based on any DC superhero, he couldn't pick a better one than Mr. Terrific. While there wouldn't be many horror elements, it would have to involve a man creating his own tech in a world that still fears a powerful hero of color, who still goes out and does the right thing and believes in his teammates and the good fight. Plus, a potential cameo from the Spectre would be awesome, since the Spirit of Vengeance is so tied to Holt's origin almost as much as Sloane is.