LoRA that was trained on art of heavily muscular Team Fortress 2 males. It is bad at generating Spy and Scout, but other characters in trigger words work fine. You can also add artist tag. Best weight is around ~0.6.

male focus, pectorals, muscular male - do all the work, you can add more if you need tho.

Top 100 tags for reference:

male focus (156)
muscular male (156)
bara (156)
muscular (155)
short hair (154)
pectorals (146)
large pectorals (139)
facial hair (131)
mature male (125)
thighs (124)
nipples (122)
thick thighs (118)
abs (118)
penis (117)
stomach (102)
navel (101)
nude (100)
erection (99)
uncensored (92)
chest hair (90)
male pubic hair (85)
multiple boys (82)
yaoi (81)
testicles (80)
1boy (79)
2boys (78)
completely nude (78)
arm hair (77)
solo (75)
pubic hair (74)
beard (70)
sideburns (69)
soldier_tf2 (68)
leg hair (66)
blush (65)
navel hair (65)
hairy (62)
medic_tf2 (51)
hat (49)
anal (48)
feet out of frame (46)
sex (45)
cum (42)
shirt (39)
stubble (38)
glasses (38)
black hair (38)
ass (36)
helmet (36)
smile (36)
spread legs (34)
sweat (33)
dark skin (33)
dark-skinned male (32)
english text (31)
by Hazylulu (31)
by GenerIButtNaked (30)
sunglasses (30)
lying (28)
gloves (28)
full body (28)
bottomless (28)
engineer_tf2 (27)
by machosoldier (27)
by remert (26)
flaccid (26)
looking at viewer (25)
bare pectorals (24)
pants (23)
sniper_tf2 (23)
open clothes (22)
by sniperstalker (22)
veins (21)
naked shirt (21)
by NCalabby (21)
on back (20)
ejaculation (20)
topless male (19)
underwear (19)
solo focus (18)
bulge (18)
boots (18)
scout_tf2 (18)
biceps (17)
heavy_tf2 (17)
ejaculating while penetrated (16)
cigar (15)
collage (15)
foreskin (14)
male underwear (14)
open shirt (14)
cum in ass (14)
socks (14)
buzz cut (14)
very short hair (14)
flat color (14)
brown hair (13)
mustache (13)
white shirt (13)
couple (13)