Community Church of Joy, formerly one of the largest ELCA congregations, withdrew from the ELCA, (unrelated to that,) it is now Dream City - Glendale Campus; a huge multi-site Assembly of God church.
From Living Lutheran:
20 Largest ELCA congregations in 2012 [I believe that these are their average weekly worship attendance]
Hope, West Des Moines, Iowa 9,539
Mount Olivet, Minneapolis 6,000
Santa Maria de Guadalupe, Irving, Texas 4,500
Hope, Fargo, N.D. 3,258
St. Philip the Deacon, Plymouth, Minn. 1,968
Shepherd of the Valley, Apple Valley, Minn. 1,920
St. Andrew, Mahtomedi, Minn. 1,894
Bethlehem, Minneapolis 1,698
Lord of Life, Maple Grove, Minn. 1,483
Good Shepherd, Naperville, Ill. 1,475
Sheridan, Lincoln, Neb. 1,432
Our Savior of East Mesa, Mesa, Ariz. 1,418
Prince of Peace, Burnsville, Minn. 1,389
Mount Calvary, Excelsior, Minn. 1,375
Southwood, Lincoln, Neb. 1,345
Community, Las Vegas 1,258
Our Saviour, Naperville, Ill. 1,222
Good Shepherd, Madison, Wis. 1,216
St. Paul, Davenport, Iowa 1,195
Hope, The Villages, Fla. 1,183
Hope Lutheran in West Des Moines is fairly new, having been organized in 1994. The latest figures (2019): baptized members 19,220 average worship 13,021. They have 10 clergy, Mike Housholder, was the founding pastor and is still the lead pastor.
Mount Olivet, had been the largest congregation for many years. It was organized in 1920. Its latest figures has 15,212 baptized members. Its in house average worship is 2550. I don't know about the tradition of their pastoral leadership, but I'm certain it hasn't been the same one for the past 102 years.