Ovett never ran 3:46 (or won 1500 Olympic silver). I was willing to excuse it once but not twice.
Like THOUGHTSLEADER mentioned, the ‘99-‘02 era Kenyan team could be very strong. Lagat at 1600, Ngeny at 1200 (think about that, you’re putting a 3:43.40 miler on the 1200 leg because you have a 3:26.34 1500 guy who’s more distance-leaning, and your 3:43 guy is the 1k WR holder), and Wilfred Bungei who ran 1:42.34 in ‘02.
The 2017-18 Kenyan team could also be quite strong. Just in those two seasons, Cheruiyot ran 3:28.41, Manangoi ran 3:28.80 and E. Korir ran 1:42.05. Not quite as good as the ~2001 and ~2011 editions though, I suppose.
Considering the U.S. squad, I want to ask how fast and loose we’re playing with the “same era” thing? Because for instance, Ovett wasn’t in top form in 1984, Coe wasn’t in top form in 1983, and Cram hadn’t fully matured in 1980. If we’re willing to stretch to 2016-2021, Centrowitz (3:46.x)/Hocker (2:45.x)/Brazier (1:42.x)/Norman (43.x) would make a strong squad—not the winner, probably not the strongest U.S. team, but better than any team outside of these 3 countries that I can think of.
Norway 2018-2021 would have 3 good legs (Ingebrigtsen 3:45.x/Ingebrigtsen 2:45.x/Warholm 44.x) but could only put up a 1:45.x 800 leg, effectively putting them out of contention for the podium.
Final answer (one per country):
1. Kenya ‘99-‘02 8:52.1
Noah Ngeny 2:42.6
Ezra Sambu 44.2 (3:26.8)
Wilfred Bungei 1:42.3 (5:09.1)
Bernard Lagat 3:43.0 (8:52.1)
2. Great Britain ‘81-‘85 8:56.0
Steve Ovett 2:44.5
Phil Brown 45.0 (3:29.5)
Sebastian Coe 1:41.5 (5:11.0)
Steve Cram 3:45.0 (8:56.0)
3. United States ‘07-‘10 8:57.2
Alan Webb 2:44.3
Jeremy Wariner 43.3 (3:27.6)
Khadevis Robinson 1:43.6 (5:11.2)
Bernard Lagat 3:46.0 (8:57.2)