I've got 19,236 Cubs cards from 284 different brands listed on a spreadsheet. A random number generator picked five cards, one each from the past several decades.
1900s - 1970s: 1971 Dell Today John Callison Callison played in just 103 games for the 1971 Cubs and hit a pathetic .210. His best days were behind him.1980s: 1981 Topps #352 Dick Tidrow Tidrow was one bad looking dude!
1990s: 1994 Pacific #115 Rick Wilkins This card is from Pacific's debut set.
2000s: 2000 Pacific #80 Manny Alexander The RNG grabbed a second consecutive card from Pacific. I can't say that they improved their look much since their debut.