In each position in League of Legends, there are many champions with very special and complex strategic roles, making their roles important but not easy to play. If you want a champion that can simply dive into the enemy team and ‘spam’ all abilities to win, then the following names will not disappoint you:
Amumu

When jungling, clearing camps is very simple with the combo Q and constantly spamming E, allowing Amumu to keep an eye on the map while farming. When ganking, if he misses the Q, Amumu can just… go back to farming jungle camps.
But in team fights, as long as Amumu successfully approaches the enemy team with his Q ability, this Sad Mummy can use his ultimate and continuously spam E whenever possible. When combined with champions like Galio, Malphite, Rumble, Nami,… they can create beautiful wombo combos. If the situation feels too dangerous, just hitting the Stopwatch will throw the enemies into chaos, as Amumu’s teammates will definitely arrive in time to assist.

Zac

When jungling, Zac can clear the jungle very quickly (his skills all deal area damage) without losing health thanks to his passive, Cell Division. When ganking, Zac is a huge threat in the eyes of the enemy, as he can gank from numerous different angles thanks to his Elastic Slingshot (E) which has an extremely long range.
In team fights, as long as Zac lands on the enemy team with his E, this champion can freely ‘spam keys’ to take down enemies in no time (if built for damage). If built tanky, Zac can control the entire enemy team with knock-ups, pulls, stuns, or slows, and since Zac is quite sturdy, he can keep chasing down enemies until they are defeated. While the enemy team is still in chaos from Zac’s jump, Zac’s teammates can join in and wipe out the enemy team.

Xin Zhao

In the early game, when ganking, Xin Zhao doesn’t need to think too much, just run up from behind the enemy and stab with Three Talon Strike (Q) + Smite, then use Wind Becomes Lightning (W), and finally, when the enemy uses Flash or escape abilities, he can chase with Challenge (E).
In team fights, Xin Zhao’s only task is to ‘stab into the weakest point of the enemy team’. When diving to attack the squishy champions of the enemy, Xin Zhao can freely ‘spam keys’ using all his abilities EQWR. At this point, Xin Zhao is built for full damage, allowing him to take down weak health targets extremely quickly. At the same time, Xin Zhao doesn’t have to worry about being taken down himself because Crescent Guard (R) will push other enemies away and block all damage from afar (outside the influence of R).
