The missing one

Each question lists the top 5 in a category, with one missing.


1Top 5 longest rivers in the world. 1 Nile, 2 Amazon, 3 Yangtze 4 ??, 5 Yenisei
2Top 5 countries by area (do not include Antarctica as it is owned by many countries): 1 Russia, 2 ??, 3 China, 4 United States, 5 Brazil
3Artists who have had the most UK no1 hits (since it started in 1952): 1 Elvis Presley (21 hits), 2 Beatles (17 hits), 3 Cliff Richard (14 hits), 4 ?? (14 hits), 5 Madonna (13 hits)
4Top 5 longest-running West End shows: 1 The Mousetrap, 2 ??, 3 The Phantom of the Opera, 4 The Woman in Black, 5 Blood Brothers
5Top 5 nations that have appeared at most football World Cup finals: 1 Brazil, 2 Germany, 3 ??, 4 Argentina, 5 Mexico
6Top 5 counties of England by their highest point: 1 Cumbria (Scafell Pike), 2 Northumberland (The Cheviot), 3 Durham (Mickle Fell), 4 North Yorkshire (Whernside), 5 ?? (Black Mountain)
7Top 5 countries by population: 1 China, 2 India, 3 United States, 4 ??, 5 Pakistan
8Top 5 airlines in the world, by countries served (as of Dec 2020): 1 ?? (121 countries), 2 Air France (91 countries), 3 British Airways (82 countries), 4 Ethiopian Airlines (81 countries), 5 Emirates (78 countries)
9Top 5 most expensive footballers bought be British teams (as of Dec 2020): 1 Paul Pogba (Man Utd £89m), 2 Harry Maguire (Man Utd £80m), 3 Romelu Lukaku (Man Utd £75m), 4 ?? (Liverpool £75m), 5 Nicolas Pépé (Arsenal £72m)
10Rolls Royce produced 5 models of car (in 2020). In price order: 1 Phantom ($450k), 2 ??? ($346k), 3 Cullinan ($328k) 4 Wraith ($322k), 5 Ghost ($315k)
quiz kindly submitted by Fraenulum on 28th December 2020