fun for minigames and battles has ice and fire, useless swords ICBM classic lucraft(and its many addons) and others. If you want more vanilla+ Minecraft based there's advanced energetics tinkers construct and some basic vanilla+ mods meant to improve upon just regular Minecraft.
all mods:
lucraft
lucraft addons iron man, speedster heroes, Wakanda addon, Manhattan project.
ice and fire
advanced energetics 2
df heroes and its addon
security craft
icbm classic
tinkerers construct
crayfish furniture and gun mod
vampirism
betweenlands
advent of ascension
abyssal craft
blood magic
twilight forest
electro blobs wizardry and its twilight forest addon
apples+
avaritia
draconic evolution and draconic additions
block armor
botania
JEI
flux network
fun items mod
infinity craft
mhau tsukai
mowzies mobs
portal gun
essentials
resizing potions
switch bows
aether
useless swords
waystones
and many more on the way
If you have any mods you would like me to add let me know in comments
Thanks for your support